m1saka fa9640d919 Add token usage stats and consolidate credentials in SQLite ...

- New internal/stats (types) and internal/store (SQLite owner: requests + credentials tables, WAL); store implements stats.Recorder.
- Stream (SSE tee) and non-stream chat paths parse upstream usage incl. cached_tokens and record per-request; add /api/stats, /api/stats/reset, /admin/stats HTML with cache hit rate.
- Drop credentials.json: remove auth file I/O and ZHANLU_CREDENTIALS_FILE; credential precedence is env vars > db row.

2026-08-19 15:52:00 +08:00

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zhanlu-proxy

Add token usage stats and consolidate credentials in SQLite

2026-08-19 15:52:00 +08:00