assets: fix edge-label white-line rendering artifact in remaining 7 diagrams

Same fix as orchestration-flow-patterns.svg (8772564), applied after a
comprehensive re-check that found the bug wasn't limited to the 6 files
originally caught by a narrower pattern match - architecture-overview.svg
and firewall-and-network-docker-bypass.svg were also affected.

Confirmed via a control test on orchestration-flow-patterns.svg that the
.drawio source's labelBackgroundColor property was never the actual
cause (reverted it, re-exported, still broken, still fixed cleanly by
the same strip) - this is a draw.io export-time quirk, not a content or
convention problem, so no CLAUDE.md changes needed.

Each file: stripped the same broken wrapper-div background-color
declarations (flat #1C1D1E / #ffffff, or the equivalent light-dark()/
var(--ge-adaptive-bg) variants - not consistent across exports of the
same file), verified 0 remain, valid XML, and the correct adaptive span
background count unchanged before/after in every file.

Files: architecture-overview.svg, firewall-and-network-docker-bypass.svg,
iac-pipeline-tools-flow.svg, observability-pipeline.svg,
readme-trust-boundaries-blast-radius.svg, secret-distribution-flows.svg,
secrets-and-pki-lifecycle.svg

assets/iac-pipeline-tools-flow.svg

@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!-- Do not edit this file with editors other than draw.io -->
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<svg xmlns="http://www.w3.org/2000/svg" style="background: transparent; background-color: transparent; color-scheme: light dark;" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="1052px" height="132px" viewBox="0 0 1052 132" content="&lt;mxfile host=&quot;embed.diagrams.net&quot; scale=&quot;1&quot; border=&quot;0&quot;&gt;&#10;  &lt;diagram name=&quot;Tools Flow&quot; id=&quot;iac-toolsflow-1&quot;&gt;&#10;    &lt;mxGraphModel dx=&quot;1414&quot; dy=&quot;791&quot; grid=&quot;1&quot; gridSize=&quot;10&quot; guides=&quot;1&quot; tooltips=&quot;1&quot; connect=&quot;1&quot; arrows=&quot;1&quot; fold=&quot;1&quot; page=&quot;1&quot; pageScale=&quot;1&quot; pageWidth=&quot;1080&quot; pageHeight=&quot;240&quot; math=&quot;0&quot; shadow=&quot;0&quot;&gt;&#10;      &lt;root&gt;&#10;        &lt;mxCell id=&quot;0&quot; /&gt;&#10;        &lt;mxCell id=&quot;1&quot; parent=&quot;0&quot; /&gt;&#10;        &lt;mxCell id=&quot;packer&quot; parent=&quot;1&quot; style=&quot;rounded=1;whiteSpace=wrap;html=1;fillColor=#dae8fc;strokeColor=#6c8ebf;fontColor=#333333;fontSize=13;fontStyle=1;shadow=1;&quot; value=&quot;Packer&amp;lt;br&amp;gt;&amp;lt;font style=&amp;quot;font-size: 10px;&amp;quot;&amp;gt;builds the base image&amp;lt;/font&amp;gt;&quot; vertex=&quot;1&quot;&gt;&#10;          &lt;mxGeometry height=&quot;70&quot; width=&quot;200&quot; x=&quot;20&quot; y=&quot;80&quot; as=&quot;geometry&quot; /&gt;&#10;        &lt;/mxCell&gt;&#10;        &lt;mxCell id=&quot;terraform&quot; parent=&quot;1&quot; style=&quot;rounded=1;whiteSpace=wrap;html=1;fillColor=#ffe6cc;strokeColor=#d79b00;fontColor=#333333;fontSize=13;fontStyle=1;shadow=1;&quot; value=&quot;Terraform&amp;lt;br&amp;gt;&amp;lt;font style=&amp;quot;font-size: 10px;&amp;quot;&amp;gt;provisions the VM&amp;lt;/font&amp;gt;&quot; vertex=&quot;1&quot;&gt;&#10;          &lt;mxGeometry height=&quot;70&quot; width=&quot;200&quot; x=&quot;300&quot; y=&quot;80&quot; as=&quot;geometry&quot; /&gt;&#10;        &lt;/mxCell&gt;&#10;        &lt;mxCell id=&quot;tags&quot; parent=&quot;1&quot; style=&quot;rounded=1;whiteSpace=wrap;html=1;fillColor=#fff2cc;strokeColor=#d6b656;fontColor=#333333;fontSize=13;fontStyle=1;shadow=1;&quot; value=&quot;host_tags.yml&amp;lt;br&amp;gt;&amp;lt;font style=&amp;quot;font-size: 10px;&amp;quot;&amp;gt;the tag list&amp;lt;/font&amp;gt;&quot; vertex=&quot;1&quot;&gt;&#10;          &lt;mxGeometry height=&quot;70&quot; width=&quot;200&quot; x=&quot;580&quot; y=&quot;80&quot; as=&quot;geometry&quot; /&gt;&#10;        &lt;/mxCell&gt;&#10;        &lt;mxCell id=&quot;ansible&quot; parent=&quot;1&quot; style=&quot;rounded=1;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#333333;fontSize=13;fontStyle=1;shadow=1;&quot; value=&quot;Ansible&amp;lt;br&amp;gt;&amp;lt;font style=&amp;quot;font-size: 10px;&amp;quot;&amp;gt;configures &amp;amp;amp; hardens&amp;lt;/font&amp;gt;&quot; vertex=&quot;1&quot;&gt;&#10;          &lt;mxGeometry height=&quot;70&quot; width=&quot;200&quot; x=&quot;860&quot; y=&quot;80&quot; as=&quot;geometry&quot; /&gt;&#10;        &lt;/mxCell&gt;&#10;        &lt;mxCell id=&quot;e1&quot; edge=&quot;1&quot; parent=&quot;1&quot; source=&quot;packer&quot; style=&quot;html=1;endArrow=block;strokeColor=#6c8ebf;strokeWidth=2;rounded=1;&quot; target=&quot;terraform&quot;&gt;&#10;          &lt;mxGeometry relative=&quot;1&quot; as=&quot;geometry&quot; /&gt;&#10;        &lt;/mxCell&gt;&#10;        &lt;mxCell id=&quot;e2&quot; edge=&quot;1&quot; parent=&quot;1&quot; source=&quot;terraform&quot; style=&quot;html=1;labelBackgroundColor=#1C1D1E;endArrow=block;strokeColor=#d79b00;fontColor=#d79b00;strokeWidth=2;rounded=1;fontSize=11;&quot; target=&quot;tags&quot; value=&quot;&amp;lt;span style=&amp;quot;background-color: light-dark(rgb(255, 255, 255), rgb(28, 29, 30));&amp;quot;&amp;gt;generates&amp;lt;/span&amp;gt;&quot;&gt;&#10;          &lt;mxGeometry relative=&quot;1&quot; y=&quot;15&quot; as=&quot;geometry&quot; /&gt;&#10;        &lt;/mxCell&gt;&#10;        &lt;mxCell id=&quot;e3&quot; edge=&quot;1&quot; parent=&quot;1&quot; source=&quot;tags&quot; style=&quot;html=1;endArrow=block;strokeColor=#d6b656;strokeWidth=2;rounded=1;&quot; target=&quot;ansible&quot;&gt;&#10;          &lt;mxGeometry relative=&quot;1&quot; as=&quot;geometry&quot; /&gt;&#10;        &lt;/mxCell&gt;&#10;        &lt;mxCell id=&quot;loop&quot; edge=&quot;1&quot; parent=&quot;1&quot; source=&quot;ansible&quot; style=&quot;html=1;endArrow=block;strokeColor=#82b366;strokeWidth=2;rounded=1;curved=1;labelBackgroundColor=#1C1D1E;fontColor=#82b366;fontSize=11;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=1;entryDx=0;entryDy=0;&quot; target=&quot;ansible&quot; value=&quot;&amp;lt;span style=&amp;quot;background-color: light-dark(rgb(255, 255, 255), rgb(28, 29, 30));&amp;quot;&amp;gt;&amp;lt;font style=&amp;quot;font-size: 12px;&amp;quot;&amp;gt;re-applied every run&amp;lt;/font&amp;gt;&amp;lt;/span&amp;gt;&quot;&gt;&#10;          &lt;mxGeometry Line truncated
+<svg xmlns="http://www.w3.org/2000/svg" style="background: transparent; background-color: transparent; color-scheme: light dark;" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="1052px" height="132px" viewBox="0 0 1052 132" content="&lt;mxfile host=&quot;embed.diagrams.net&quot; scale=&quot;1&quot; border=&quot;0&quot;&gt;&#10;  &lt;diagram name=&quot;Tools Flow&quot; id=&quot;iac-toolsflow-1&quot;&gt;&#10;    &lt;mxGraphModel dx=&quot;1414&quot; dy=&quot;791&quot; grid=&quot;1&quot; gridSize=&quot;10&quot; guides=&quot;1&quot; tooltips=&quot;1&quot; connect=&quot;1&quot; arrows=&quot;1&quot; fold=&quot;1&quot; page=&quot;1&quot; pageScale=&quot;1&quot; pageWidth=&quot;1080&quot; pageHeight=&quot;240&quot; math=&quot;0&quot; shadow=&quot;0&quot;&gt;&#10;      &lt;root&gt;&#10;        &lt;mxCell id=&quot;0&quot; /&gt;&#10;        &lt;mxCell id=&quot;1&quot; parent=&quot;0&quot; /&gt;&#10;        &lt;mxCell id=&quot;packer&quot; parent=&quot;1&quot; style=&quot;rounded=1;whiteSpace=wrap;html=1;fillColor=#dae8fc;strokeColor=#6c8ebf;fontColor=#333333;fontSize=13;fontStyle=1;shadow=1;&quot; value=&quot;Packer&amp;lt;br&amp;gt;&amp;lt;font style=&amp;quot;font-size: 10px;&amp;quot;&amp;gt;builds the base image&amp;lt;/font&amp;gt;&quot; vertex=&quot;1&quot;&gt;&#10;          &lt;mxGeometry height=&quot;70&quot; width=&quot;200&quot; x=&quot;20&quot; y=&quot;80&quot; as=&quot;geometry&quot; /&gt;&#10;        &lt;/mxCell&gt;&#10;        &lt;mxCell id=&quot;terraform&quot; parent=&quot;1&quot; style=&quot;rounded=1;whiteSpace=wrap;html=1;fillColor=#ffe6cc;strokeColor=#d79b00;fontColor=#333333;fontSize=13;fontStyle=1;shadow=1;&quot; value=&quot;Terraform&amp;lt;br&amp;gt;&amp;lt;font style=&amp;quot;font-size: 10px;&amp;quot;&amp;gt;provisions the VM&amp;lt;/font&amp;gt;&quot; vertex=&quot;1&quot;&gt;&#10;          &lt;mxGeometry height=&quot;70&quot; width=&quot;200&quot; x=&quot;300&quot; y=&quot;80&quot; as=&quot;geometry&quot; /&gt;&#10;        &lt;/mxCell&gt;&#10;        &lt;mxCell id=&quot;tags&quot; parent=&quot;1&quot; style=&quot;rounded=1;whiteSpace=wrap;html=1;fillColor=#fff2cc;strokeColor=#d6b656;fontColor=#333333;fontSize=13;fontStyle=1;shadow=1;&quot; value=&quot;host_tags.yml&amp;lt;br&amp;gt;&amp;lt;font style=&amp;quot;font-size: 10px;&amp;quot;&amp;gt;the tag list&amp;lt;/font&amp;gt;&quot; vertex=&quot;1&quot;&gt;&#10;          &lt;mxGeometry height=&quot;70&quot; width=&quot;200&quot; x=&quot;580&quot; y=&quot;80&quot; as=&quot;geometry&quot; /&gt;&#10;        &lt;/mxCell&gt;&#10;        &lt;mxCell id=&quot;ansible&quot; parent=&quot;1&quot; style=&quot;rounded=1;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontColor=#333333;fontSize=13;fontStyle=1;shadow=1;&quot; value=&quot;Ansible&amp;lt;br&amp;gt;&amp;lt;font style=&amp;quot;font-size: 10px;&amp;quot;&amp;gt;configures &amp;amp;amp; hardens&amp;lt;/font&amp;gt;&quot; vertex=&quot;1&quot;&gt;&#10;          &lt;mxGeometry height=&quot;70&quot; width=&quot;200&quot; x=&quot;860&quot; y=&quot;80&quot; as=&quot;geometry&quot; /&gt;&#10;        &lt;/mxCell&gt;&#10;        &lt;mxCell id=&quot;e1&quot; edge=&quot;1&quot; parent=&quot;1&quot; source=&quot;packer&quot; style=&quot;html=1;endArrow=block;strokeColor=#6c8ebf;strokeWidth=2;rounded=1;&quot; target=&quot;terraform&quot;&gt;&#10;          &lt;mxGeometry relative=&quot;1&quot; as=&quot;geometry&quot; /&gt;&#10;        &lt;/mxCell&gt;&#10;        &lt;mxCell id=&quot;e2&quot; edge=&quot;1&quot; parent=&quot;1&quot; source=&quot;terraform&quot; style=&quot;html=1;labelBackgroundColor=#1C1D1E;endArrow=block;strokeColor=#d79b00;fontColor=#d79b00;strokeWidth=2;rounded=1;fontSize=11;&quot; target=&quot;tags&quot; value=&quot;&amp;lt;span style=&amp;quot;background-color: light-dark(rgb(255, 255, 255), rgb(28, 29, 30));&amp;quot;&amp;gt;generates&amp;lt;/span&amp;gt;&quot;&gt;&#10;          &lt;mxGeometry relative=&quot;1&quot; y=&quot;15&quot; as=&quot;geometry&quot; /&gt;&#10;        &lt;/mxCell&gt;&#10;        &lt;mxCell id=&quot;e3&quot; edge=&quot;1&quot; parent=&quot;1&quot; source=&quot;tags&quot; style=&quot;html=1;endArrow=block;strokeColor=#d6b656;strokeWidth=2;rounded=1;&quot; target=&quot;ansible&quot;&gt;&#10; 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