feat(memoir): 回忆录分段两阶段管线（Phase1 分类 / Phase2 叙事）与配置、测试

api/tests/test_memoir_skip_story.py

@@ -9,12 +9,15 @@ from app.agents.memoir.classification_agent import (
 )
 from app.agents.memoir.extraction_agent import ExtractionResult
 from app.agents.memoir.orchestrator import MemoirOrchestrator
-from app.agents.state_schema import MemoirStateSchema
+from app.agents.stage_constants import CHAT_STAGES
+from app.agents.state_schema import DEFAULT_STAGE_ORDER, MemoirStateSchema
 
 
 def _empty_state() -> MemoirStateSchema:
+    """与生产默认一致的五阶段 stage_order（计划 §5-C 全量阶段管道覆盖）。"""
+    assert list(CHAT_STAGES) == DEFAULT_STAGE_ORDER
     return MemoirStateSchema(
-        stage_order=["childhood"],
+        stage_order=list(CHAT_STAGES),
         current_stage="childhood",
         covered_stages=[],
         slots={},