refactor(runtime): lazily activate host modules (#6331)

app/runtime/capabilities/errors.py

@@ -0,0 +1,32 @@
+class CapabilityError(RuntimeError):
+    """Capability Runtime 错误基类。"""
+
+
+class CapabilityManifestError(CapabilityError, ValueError):
+    """能力声明不完整、冲突或违反当前 schema。"""
+
+
+class UnknownCapabilityError(CapabilityError, KeyError):
+    """请求了 Registry 中不存在的能力。"""
+
+
+class CapabilityAdapterModeError(CapabilityError, TypeError):
+    """调用入口与适配器并发模型不匹配。"""
+
+
+class CapabilityAdapterContractError(CapabilityError, TypeError):
+    """适配器回调返回值不符合已声明的并发模型。"""
+
+
+class CapabilityOperationError(CapabilityError):
+    """能力物化或资源生命周期转换失败。"""
+
+    def __init__(self, capability_id: str, operation: str, error: BaseException):
+        self.capability_id = capability_id
+        self.operation = operation
+        self.error = error
+        super().__init__(f"能力 {capability_id} 执行 {operation} 失败：{error}")
+
+
+class CapabilityRuntimeClosedError(CapabilityError):
+    """Runtime 已进入关闭态，禁止启动或重新物化能力。"""