bugfix

migrations/0016_acp_turns.up.sql

@@ -0,0 +1,19 @@
+-- 回合完成检测：per-turn 审计记录 + session 上记录最后一次 stop reason。
+-- last_stop_reason 不加 CHECK：agent 可能返回 vendor-specific 值，由 Go 层归一化但原值落库。
+ALTER TABLE acp_sessions ADD COLUMN last_stop_reason TEXT;
+
+CREATE TABLE acp_turns (
+  id                 BIGSERIAL PRIMARY KEY,
+  session_id         UUID NOT NULL REFERENCES acp_sessions(id) ON DELETE CASCADE,
+  turn_index         INT NOT NULL,
+  prompt_request_id  TEXT,
+  status             TEXT NOT NULL,
+  stop_reason        TEXT,
+  update_count       INT NOT NULL DEFAULT 0,
+  started_at         TIMESTAMPTZ NOT NULL DEFAULT now(),
+  completed_at       TIMESTAMPTZ,
+  CONSTRAINT acp_turns_status_check CHECK (status IN ('in_progress','completed','aborted')),
+  CONSTRAINT acp_turns_session_index_unique UNIQUE (session_id, turn_index)
+);
+CREATE INDEX idx_acp_turns_session ON acp_turns(session_id, turn_index);
+CREATE INDEX idx_acp_turns_created ON acp_turns(started_at);