* feat: add Admiral Hardened Build channel and business assurance surfaces
Introduce Studio Saelix entitlement-backed Hardened Build switching, a
single-flight image operation coordinator, Recovery Vault naming, Admiral
Account settings, and typed Fleet update failures while preserving Community
custom-repo and targetless pull-current updates.
* fix: harden image-op paths and clear CI CodeQL/pilot flake
Validate operation IDs before filesystem use, use hostname checks in Fleet
fetch mocks, sanitize registry probe logs, and swallow expected TCP teardown
errors in the pilot reverse-route post-handshake test.
* fix: sanitize image-op docker config write and probe logs
Allowlist-copy registry host keys and base64 auth before writing the
temp DOCKER_CONFIG, and log registry probe failures with a fixed message
so CodeQL no longer flags network-to-file and log-injection mediums.
* fix: address Admiral Hardened Build audit blockers
Expose imageChannel so hardened Fleet peers still POST for typed rejection, claim community updates before 202, terminalize helper failures, gate Hardened on paid, and align support/docs/e2e wording.
* fix: terminalize image ops on helper survival and aborted claims
* fix: prevent recreating persist from overwriting helper-exit failure
* test: assert helper-exit failure lands before recreating persist
* fix: keep current pointer when acknowledging a stale image operation
Anso