관리자 감정 관측 기록과 조회 API 추가

infra/db/init/23_client_affect_trace.sql

@@ -0,0 +1,39 @@
+-- =============================================================================
+-- Vignette · migration 23 — 관리자 감정 관측용 Jev 전이 trace
+-- =============================================================================
+-- 기존 turns/session_state 행은 수정하지 않는다. trace는 성공한 client 턴에만
+-- 연결되며, 앱 런타임은 client turn INSERT와 state UPSERT를 같은 트랜잭션에 둔다.
+
+CREATE TABLE IF NOT EXISTS app.client_affect_trace (
+  turn_id UUID PRIMARY KEY REFERENCES app.turns(id) ON DELETE CASCADE,
+  session_id UUID NOT NULL REFERENCES app.sessions(id) ON DELETE CASCADE,
+  trace JSONB NOT NULL,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS idx_client_affect_trace_session_created
+  ON app.client_affect_trace (session_id, created_at DESC);
+
+ALTER TABLE app.client_affect_trace ENABLE ROW LEVEL SECURITY;
+
+DROP POLICY IF EXISTS p_client_affect_trace_select_admin ON app.client_affect_trace;
+DROP POLICY IF EXISTS p_client_affect_trace_insert_learner ON app.client_affect_trace;
+
+CREATE POLICY p_client_affect_trace_select_admin
+  ON app.client_affect_trace FOR SELECT
+  USING (app.current_role_name() = 'admin');
+
+CREATE POLICY p_client_affect_trace_insert_learner
+  ON app.client_affect_trace FOR INSERT
+  WITH CHECK (
+    app.current_role_name() = 'learner'
+    AND EXISTS (
+      SELECT 1
+      FROM app.turns AS turn_row
+      JOIN app.sessions AS session_row ON session_row.id = turn_row.session_id
+      WHERE turn_row.id = app.client_affect_trace.turn_id
+        AND turn_row.session_id = app.client_affect_trace.session_id
+        AND turn_row.speaker = 'client'
+        AND session_row.learner_id = app.current_uid()
+    )
+  );