REVIEW-001 (M0) M3s: the fixed-window limiter's state map was never pruned,
so a flood of distinct keys grew it without bound (memory DoS).
Sweep elapsed windows on insert — gated on a size threshold and at most once
per window, so it stays amortised — and hard-cap the map (65536 entries) as
the backstop. Expose Len() for tests/observability and cover both the sweep
and the cap.
- store: SQLite (WAL, foreign keys ON, CGO-free driver) + the embedded
migration runner; each module's migrations are name-prefixed (D-012)
- audit: the append-only audit log; the actor threads via context (R-1)
- users: the user_id/GUID/email anchors (D-013)
- config: the YAML settings file (D-035) + validation
- httpx: cookies · loopback detection · trusted-proxy XFF · CSRF · security
headers · redaction
- middleware: correlation id · audit · rate limiting
- mail: the invite/recovery mailer seam
- server: the core DOOR — the resolution switch, the dispatch registry
(RegisterModule), the role gates, /setup · enroll/login · recovery flows,
the reserved `static` workflow, and the loopback-only bootstrap (D-025)
