Follow-up to a full re-audit of the 2.0 tree. Most prior findings were already
fixed; this closes the ones that were not:
- SAML assertion replay: validateInResponseTo ifPresent plus a Redis-backed
CacheProvider, so a captured signed assertion cannot be replayed. ifPresent
keeps IdP-initiated SSO working.
- MFA login challenge burned after 5 wrong TOTP codes.
- api_keys.key_prefix indexed; the per-request lookup was a full table scan.
- MAX_AI_JOBS_PER_USER caps a user's in-flight single-file AI jobs (the AI pool
runs at concurrency 1). Batch and pipeline AI stay uncapped.
- MAX_WORKSPACE_SIZE_GB enforced instead of being dead config.
- SUBPROCESS_MEMORY_LIMIT_MB (default off) for the native media and doc engines;
not applied to the AI sidecar.
- SVG sanitizer closes unquoted and whitespace-prefixed javascript: hrefs and
the animateTransform/animateMotion/handler/mpath elements.
- Windows-style paths stripped from error output to match the Sentry scrubber.
- Postgres and Redis compose services get cap_drop plus pids_limit and cpus.
- .env.example ships MAX_SVG_SIZE_MB=50 (0 disabled the cap).
Adds security-focused unit and integration tests. typecheck, biome, and the
full unit and integration suites pass.
