전 저장소 리팩터링과 SSOT 정비

infra/db/init/06_session_evaluation.sql

@@ -135,13 +135,46 @@ CREATE TABLE IF NOT EXISTS app.live_coach_events (
   session_id UUID NOT NULL REFERENCES app.sessions(id) ON DELETE CASCADE,
   turn_seq INT NOT NULL CHECK (turn_seq >= 1),
   stage TEXT NOT NULL,
+  event_type TEXT NOT NULL DEFAULT 'use'
+    CHECK (event_type IN ('use', 'recharge')),
+  credit_delta INT NOT NULL DEFAULT -1,
+  credit_balance INT,
+  reason TEXT,
   learner_text_excerpt TEXT,
   client_reply_excerpt TEXT,
   payload JSONB NOT NULL DEFAULT '{}'::jsonb,
   created_at TIMESTAMPTZ NOT NULL DEFAULT now()
 );
+ALTER TABLE app.live_coach_events
+  ADD COLUMN IF NOT EXISTS event_type TEXT NOT NULL DEFAULT 'use';
+ALTER TABLE app.live_coach_events
+  ADD COLUMN IF NOT EXISTS credit_delta INT NOT NULL DEFAULT -1;
+ALTER TABLE app.live_coach_events
+  ADD COLUMN IF NOT EXISTS credit_balance INT;
+ALTER TABLE app.live_coach_events
+  ADD COLUMN IF NOT EXISTS reason TEXT;
+UPDATE app.live_coach_events
+   SET event_type = 'use'
+ WHERE event_type IS NULL OR event_type NOT IN ('use', 'recharge');
+UPDATE app.live_coach_events
+   SET credit_delta = CASE WHEN event_type = 'recharge' THEN 1 ELSE -1 END
+ WHERE credit_delta IS NULL;
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1
+    FROM pg_constraint
+    WHERE conname = 'live_coach_events_event_type_check'
+  ) THEN
+    ALTER TABLE app.live_coach_events
+      ADD CONSTRAINT live_coach_events_event_type_check
+      CHECK (event_type IN ('use', 'recharge'));
+  END IF;
+END $$;
 CREATE INDEX IF NOT EXISTS idx_live_coach_events_session_turn
   ON app.live_coach_events(session_id, turn_seq, created_at);
+CREATE INDEX IF NOT EXISTS idx_live_coach_events_session_type
+  ON app.live_coach_events(session_id, event_type, created_at);
 
 ALTER TABLE app.live_coach_events ENABLE ROW LEVEL SECURITY;