Session 59: migration 020 — ledger team/opponent (pre-apply commit)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

supabase/migrations/020_ledger_team_opponent.sql

@@ -0,0 +1,17 @@
+-- ---------------------------------------------------------------
+-- 020 — ledger_entries team/opponent addendum (Session 59, pre-day-one).
+--
+-- Applied while ledger_entries is still at 0 rows (day one of the public
+-- record starts tomorrow) so every row ever written carries the graded
+-- player's team + opponent — unblocks VYNDR-on-team with zero backfill.
+-- Both are captured from the real feed at write time; null when the feed
+-- doesn't identify the player's team (never guessed).
+-- ---------------------------------------------------------------
+
+ALTER TABLE public.ledger_entries
+  ADD COLUMN IF NOT EXISTS team     text NULL,
+  ADD COLUMN IF NOT EXISTS opponent text NULL;
+
+-- VYNDR-on-team aggregate reads (public record scoped by team).
+CREATE INDEX IF NOT EXISTS idx_ledger_public_team
+  ON public.ledger_entries (team) WHERE user_id IS NULL;