完善权限缓存与监控指标

backend/app/core/permission_cache.py

@@ -52,6 +52,35 @@ class PermissionCache:
         self._member_role_cache[cache_key] = (role, time.time())
         return role
 
+    def get_project_permissions(
+        self,
+        study_id: uuid.UUID,
+        ttl: int | None = None,
+    ) -> dict[str, dict[str, bool]] | None:
+        """获取项目接口权限覆盖表缓存"""
+        if ttl is None:
+            ttl = self.default_ttl
+
+        cache_key = self._make_project_cache_key(study_id)
+        if cache_key not in self._project_permissions_cache:
+            return None
+
+        permissions, timestamp = self._project_permissions_cache[cache_key]
+        if self._is_expired(timestamp, ttl):
+            self._project_permissions_cache.pop(cache_key, None)
+            return None
+
+        return permissions
+
+    def set_project_permissions(
+        self,
+        study_id: uuid.UUID,
+        permissions: dict[str, dict[str, bool]],
+    ) -> None:
+        """缓存项目接口权限覆盖表"""
+        cache_key = self._make_project_cache_key(study_id)
+        self._project_permissions_cache[cache_key] = (permissions, time.time())
+
     def invalidate_project_permissions(self, study_id: uuid.UUID) -> None:
         cache_key = self._make_project_cache_key(study_id)
         self._project_permissions_cache.pop(cache_key, None)