Deluan c479c4f581 refactor(api): tighten API v1 auth internals and first-admin setup
Load the signer lock-free once cached, read the signing key before
generating one, cap the liveness cache at its limit, share one
grantable-scope predicate, and let CreateFirstAdmin open its own locked
transaction with an optional in-transaction follow-up.
2026-09-28 20:06:28 -04:00
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