MC-4048

Elmar clarified the F1/Superbru workflow and asked whether source/deadline handling needs updates. Scope: - Align F1 project docs/task descriptions with the current deadline rule: sprint pick before the Sprint race; Pole + full Top 10 in order + fastest lap before Qualifying to preserve the 2 EBP. - Be explicit that the current Superbru pool's sprint field is team/constructor-only ("which team earns most points in the sprint?"); the app may still calculate a driver sprint-winner signal, but submit only fields that exist on Superbru unless the live page adds a driver field. - Confirm the source checklist remains in the pipeline: general news, F1.com/formula1.com editorial analysis, team press, motorsport/autosport/the-race, social/Reddit/X insider sentiment, FP telemetry via FastF1/OpenF1, odds, and Polymarket. - Consider making the Saturday refresh deadline-aware instead of a fixed 19:00 UTC cron: run after Sprint data is available but before each race's qualifying_utc, using the calendar session times, so future sprint weekends don't depend on Canada-style timing. - Preserve safety: no Superbru writes in tests/dry-runs; live no-submit validation before changing selectors/submission behavior. Acceptance: - Stale docs/task wording no longer says the wrong thing about sprint winner vs team-only sprint pick. - Source checklist is documented in the workflow. - If scheduling logic changes, tests cover before-sprint and before-qualifying gates. - Ticket remains parked until MC-4044 dispatcher/worktree-pool hardening is resolved.