Stabilize runtime auth and E2E coverage

apps/api/app/store.py

@@ -42,6 +42,8 @@ class InProcSession:
     persona: PersonaCard
     state: SessionState
     session_no: int = 1
+    created_at: float = field(default_factory=time.time)
+    ended_at: Optional[float] = None
     turns: list[TurnRecord] = field(default_factory=list)
     ended: bool = False
     prev_rapport_credit: float = 0.0   # carry-over delta 계산용
@@ -55,7 +57,7 @@ class InProcSession:
 
 
 class SessionStore:
-    """in-memory 세션 레지스트리. DB degraded 시 SoR 대용."""
+    """in-memory 세션 저장소. DB degraded 시 SoR 대용."""
 
     def __init__(self) -> None:
         self._sessions: dict[str, InProcSession] = {}
@@ -89,6 +91,12 @@ class SessionStore:
     def get(self, session_id: str) -> Optional[InProcSession]:
         return self._sessions.get(session_id)
 
+    def put(self, session: InProcSession) -> None:
+        self._sessions[session.session_id] = session
+
+    def list(self) -> list[InProcSession]:
+        return list(self._sessions.values())
+
     def append_turn(self, session_id: str, turn: TurnRecord) -> None:
         s = self._sessions.get(session_id)
         if s is not None:
@@ -103,6 +111,7 @@ class SessionStore:
         s = self._sessions.get(session_id)
         if s is not None:
             s.ended = True
+            s.ended_at = time.time()
         return s
 
     def remove(self, session_id: str) -> None: