Problem

The Service model's technologies field was defined as a required List[StrictStr], but the Instana API can return null for this field. This caused Pydantic validation errors when calling ApplicationAnalyzeApi.get_traces().

Solution

Changed the technologies field to Optional[List[StrictStr]] with default=None to accept null values from the API.

Changes

• File: instana_client/models/service.py
• Line 34: Changed from technologies: List[StrictStr] to technologies: Optional[List[StrictStr]] = Field(default=None, ...)

Testing

• Existing test test/test_service.py passes
• Consistent with other optional fields in the model (e.g., entity_type)

Fixes #12