fix: add missing indexes on FK columns in stratplay and stratgame (#74)

Closes #74

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/db_engine.py

@@ -31,6 +31,7 @@ db = PooledPostgresqlDatabase(
     autorollback=True,  # Automatically rollback failed transactions
 )
 
+
 date = f"{datetime.datetime.now().year}-{datetime.datetime.now().month}-{datetime.datetime.now().day}"
 logger = logging.getLogger("discord_app")
 
@@ -2481,6 +2482,12 @@ class StratGame(BaseModel):
         home_stan.save()
         away_stan.save()
 
+    class Meta:
+        indexes = (
+            (("season",), False),
+            (("season", "week", "game_num"), False),
+        )
+
 
 class StratPlay(BaseModel):
     game = ForeignKeyField(StratGame)
@@ -2555,6 +2562,14 @@ class StratPlay(BaseModel):
     re24_primary = FloatField(null=True)
     re24_running = FloatField(null=True)
 
+    class Meta:
+        indexes = (
+            (("game",), False),
+            (("batter",), False),
+            (("pitcher",), False),
+            (("runner",), False),
+        )
+
 
 class Decision(BaseModel):
     game = ForeignKeyField(StratGame)

migrations/2026-03-27_add_stratplay_stratgame_indexes.sql

@@ -0,0 +1,24 @@
+-- Migration: Add missing indexes on foreign key columns in stratplay and stratgame
+-- Created: 2026-03-27
+--
+-- PostgreSQL does not auto-index foreign key columns. These tables are the
+-- highest-volume tables in the schema and are filtered/joined on these columns
+-- in batting, pitching, and running stats aggregation and standings recalculation.
+
+-- stratplay: FK join column
+CREATE INDEX IF NOT EXISTS idx_stratplay_game_id ON stratplay(game_id);
+
+-- stratplay: filtered in batting stats aggregation
+CREATE INDEX IF NOT EXISTS idx_stratplay_batter_id ON stratplay(batter_id);
+
+-- stratplay: filtered in pitching stats aggregation
+CREATE INDEX IF NOT EXISTS idx_stratplay_pitcher_id ON stratplay(pitcher_id);
+
+-- stratplay: filtered in running stats
+CREATE INDEX IF NOT EXISTS idx_stratplay_runner_id ON stratplay(runner_id);
+
+-- stratgame: heavily filtered by season
+CREATE INDEX IF NOT EXISTS idx_stratgame_season ON stratgame(season);
+
+-- stratgame: standings recalculation query ordering
+CREATE INDEX IF NOT EXISTS idx_stratgame_season_week_game_num ON stratgame(season, week, game_num);