dev 18c2385c61 feat: add per-source TTFB and tokens/s metrics to status page ...

- Req: add FirstByteMs field (ms to first byte, tracked for streaming)
- Stat: add FirstByteSum for aggregation
- SourceAverages(): new method computing per-source avg TTFB and tokens/s
  from the in-memory ring (300s window)
- SourceStatus: add AvgFirstByteMs and AvgTokPerS fields
- pumpStream: record FirstByteMs after first SSE chunk sent to client
- singleChat/singleChatAuto: set FirstByteMs = LatMs (non-streaming)
- handleStatusAPI: populate the new SourceStatus fields from SourceAverages()
- WebUI source table: two new columns showing TTFB (s) and Tokens/s

2026-08-25 08:24:08 +08:00

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ses_fcda7f5e1ffe9g78A7lVoLMxn7.json

feat: add per-source TTFB and tokens/s metrics to status page

2026-08-25 08:24:08 +08:00