drjones f02124c9de v1.1 security release: PBKDF2 passwords, session expiry, rate limiting, SSE streaming ...

- store.py: passwords now PBKDF2-HMAC-SHA256 (390k iters, random salt,
  constant-time compare). Legacy unsalted-SHA256 hashes upgrade transparently
  on successful login — zero impact on existing users.
- Sessions expire after 30 days (lazy cleanup on token lookup).
- Rate limiting on register (5/hr/IP), login (10/15min per IP AND per
  username), chat (30/hr/IP) — SQLite-backed, shared across gunicorn workers.
- Registration now requires 8+ char passwords.
- New /api/chat/stream SSE endpoint: citations first ('meta'), streamed
  answer deltas, 'done'. Client auto-falls back to non-streaming.
- nginx: proxy_buffering off for SSE.

2026-09-07 19:03:37 -07:00

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