[Bug]: telemetry schema drift checker ignores required-field drift

System Info

Platform-independent telemetry schema validation.

Reproduction

tensorrt_llm/usage/schemas/__main__.py::validate() compares SMS JSON Schema property names with Pydantic aliases, but does not validate the SMS required arrays.

The canonical telemetry convention says every declared event property must also appear in required. A schema edit can therefore leave a property present while accidentally removing it from required, and the drift checker still passes.

Expected behavior

For each SMS event, the validator should require set(required) == set(properties) in addition to the existing Pydantic alias/property-name check.

Actual behavior

Required-array drift is not checked.

Proposed fix

Compare each event's SMS required and properties sets in both directions, and add a regression test that removes a property from required.

Start in tensorrt_llm/usage/schemas/main.py at validate() and read the existing SMS JSON Schema versus Pydantic alias/property-name check. Add the proposed regression test for an event whose property is removed from required, and verify that required and properties must match in both directions.