Vault's ssh-client-signer mount was undocumented here entirely. Adds it
as flow 2/5 rather than merging into Certificate Flow, since the actual
mechanism differs (own systemd timer, bypasses Vault Agent's render
cycle, only reuses its cached token) - and explains why that distinction
matters for debugging. Diagram updated to match: a third data-plane box
feeding fleet-wide sshd trust instead of a container.
The SSH CA mount (ssh-client-signer/) existed live in Vault but was
missing from this doc's capability list entirely. Adds it as a fourth
"What It Does" bullet with real role config and a live screenshot of
the secrets engines list, and refreshes the stale ACL policies
screenshot (was showing 15 policies, live is 18).
The old claim described two flows sharing one keypair under different
usernames as a deliberate scoping decision. That was actually a stale,
half-migrated credential mismatch, not a design choice - the real fix was
giving Kestra a dedicated keypair with zero relation to the ansible
automation identity's own key, so a leak of one can never expose the other.
Kestra's SSH plugin has no certificate support at all (a plain Java client,
confirmed via its own plugin schema), which is the actual reason it needs
its own static key regardless of what the fleet's ansible identity does.
Added the real current flow config (kestra_local_user/kestra_local_key) and
a screenshot of the live KV Store showing exactly those two entries. Also
refreshed the automation-self-update.timer example, which had gone stale.
automation-bot