By Repo now resolves via the full chain rather than requiring repo_id
directly on the token event:
1. token_events.repo_id (direct)
2. → workstreams.repo_id (via workstream_id)
3. → task.workstream_id → workstreams.repo_id (via task_id)
Changes:
- Auto-populate repo_id on token events at creation time (both the
token_events router and the tasks router)
- New GET /token-events/by-repo/ endpoint with RepoTokenSummary schema;
returns tokens_in/out/total, event_count, by_model, by_note per repo
- Dashboard By Repo section uses /by-repo/ directly and shows repo_slug
instead of a truncated UUID
- Backfilled the three existing events (userbased) with repo_id via SQL
185 tests pass.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>