add operator issue reports for endpoint agent

Operators had no way to flag a problem PC from the tray. This adds a report path: the tray captures a reason, free-text note, and optional screenshot and the agent uploads it on the collector token to a new operatorreports table linked to the asset. Ships the endpoints 0009 migration so the table exists before the code queries it; the running DB had drifted behind the code and returned HTTP 500 on upload.

plugins/endpoints/models/__init__.py

@@ -4,8 +4,9 @@ from .endpoint import (
     EndpointState, EndpointEvent, EndpointCommand, EndpointApplication,
 )
 from .monitor import EndpointMonitor
+from .operatorreport import OperatorReport
 
 __all__ = [
     'EndpointState', 'EndpointEvent', 'EndpointCommand', 'EndpointApplication',
-    'EndpointMonitor',
+    'EndpointMonitor', 'OperatorReport',
 ]