ccf-log-tail — text log sink

Authenticated endpoints (Authorization: Bearer $LOG_TAIL_TOKEN):
  POST /log[/:channel]          body=<text line>   append one line
  POST /v1/logs                 OTLP/HTTP Logs     Cloudflare Destination receiver
  GET  /tail[/:channel]                            full buffer
  GET  /tail?since=<ISO>                           lines since timestamp
  GET  /tail?n=<N>                                 last N lines
  GET  /stream[/:channel]                          SSE live tail

Channels are arbitrary strings (e.g. main, ccf-claw, ccf-google-mcp).
OTLP Destination auto-routes records to channels named after resource.service.name.
Buffer is size-capped at 2 MB per channel. Oldest dropped first.

Example tail:
  curl -N -H "Authorization: Bearer $T" https://ccf-log-tail.<account>.workers.dev/stream/ccf-claw

Cloudflare Destination config:
  Type: Logs
  OTLP Logs Endpoint: https://ccf-log-tail.<account>.workers.dev/v1/logs
  Custom header: Authorization = Bearer <LOG_TAIL_TOKEN>