fix(influxdb3): mark disabled field as required for processing engine trigger

The API rejects requests without the disabled field, but the documentation
did not mark it as required. This updates both Core and Enterprise API specs
to correctly indicate that the disabled field is required for
POST /api/v3/configure/processing_engine_trigger.

closes #6611

https://claude.ai/code/session_01AAbf2TE2bQTpqgugthTSJF

api-docs/influxdb3/core/v3/ref.yml

@@ -2379,6 +2379,7 @@ components:
           description: Whether the trigger is disabled.
       required:
         - db
+        - disabled
         - plugin_filename
         - trigger_name
         - trigger_settings

api-docs/influxdb3/enterprise/v3/ref.yml

@@ -2567,6 +2567,7 @@ components:
           description: Whether the trigger is disabled.
       required:
         - db
+        - disabled
         - plugin_filename
         - trigger_name
         - trigger_settings