Verifying against OIDC_ISSUER_MCP fixed the 401, but would have introduced a
quieter bug. Identity is keyed on (oidc_iss, oidc_sub) and
userContextFromClaims UPSERTS rather than failing, so a token carrying the MCP
application's issuer would have created a SECOND user row for the same person:
MCP calls would succeed against an account holding none of their memories, and
nothing would appear broken.
Authentik's `sub` is `user.uid`, a user-level value that is identical across
providers (verified against the live instance), so the issuer is the only
differing component. Pin it to OIDC_ISSUER after verification.
No stray rows exist to clean up — verification failed before this path could
ever create one.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>