docs: verify bf-67io - SQL migration file already exists

The migration file migrations/0001_initial.sql was created in commit 31678be
and contains the complete schema matching cmd/acb-api/db.go.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Bead-Id: bf-67io

notes/bf-67io-verification.md

@@ -0,0 +1,24 @@
+# Bead bf-67io: Migration File Verification
+
+## Date: 2026-05-22
+
+## Verification Summary
+The SQL migration file `migrations/0001_initial.sql` exists and is complete.
+
+## Original Commit
+- **Commit:** 31678be "Infra: Add initial SQL migration file (0001_initial.sql)"
+- **Date:** 2026-05-21
+
+## Schema Coverage Verified
+All tables from `cmd/acb-api/db.go` are represented in the migration file:
+- Core: bots, matches, match_participants, jobs, rating_history
+- Season/Series: seasons, season_snapshots, series, series_games
+- Prediction: predictions, predictor_stats
+- Maps: maps, map_scores, map_votes, map_fairness
+- Evolution: programs
+- Playlists: playlists, playlist_matches
+- Feedback: replay_feedback, feedback_upvotes
+- Enrichment: enrichment_requests
+
+## Status
+Task already complete. Migration file exists and is comprehensive.