The collector's oidc/swarm authenticator verifies the bearer offline as a
JWT. The controller's authelia client was registered without
accessTokenSignedResponseAlg, so authelia mints it an opaque
authelia_at_ handle, which that authenticator cannot verify: by config,
no push from the vcs or jobq exporter can be accepted. Register it with
RS256 like every other client whose token lands on an oidc/* receiver.
The SDK logs a failed export at debug only, so a refused push never
reached the journal. AuthenticatedHttpClient now warns on a failed token
mint, a transport error, or a non-2xx answer (status plus a body
snippet), once per kind of failure and again every 10 minutes with a
count, and logs once when a push succeeds after failing.
Refs #5393
1e8c398132