Fix example generator wrapping named number types in non-existent constructors

[MintsInc]

Summary

• Named OpenAPI schemas with type: number (e.g. RumRetentionFilterSampleRate) don't generate Python classes, but the example generator was emitting broken code: a constructor call and import for a module that doesn't exist
• Root cause: formatter.py:280 excluded {"string", "integer", "boolean"} from constructor wrapping but was missing "number", so any named type: number schema with a $ref was treated as a class type
• Fix: add "number" to the exclusion set — consistent with the existing PRIMITIVE_TYPES constant. The or schema.get("enum") guard is preserved, so enum-typed number schemas remain unaffected
• Regenerated both broken RUM retention filter examples (CreateRetentionFilter.py, UpdateRetentionFilter.py)
• Added 3 test cases: regression for the fix, guard for named integers (already worked), and guard for named number enums (must still use constructor)

Affected examples (broken → fixed)

# Before (broken — module does not exist)
from datadog_api_client.v2.model.rum_retention_filter_sample_rate import RumRetentionFilterSampleRate
sample_rate=RumRetentionFilterSampleRate(50.0),

# After (correct)
sample_rate=50.0,

Test plan

• cd .generator && poetry run pytest tests/test_formatter.py -v — all 17 tests pass
• poetry run pytest tests/test_scenarios.py — all 3432 scenarios pass
• find examples/ -name "*.py" | xargs python3 -m py_compile — all examples compile cleanly

🤖 Generated with Claude Code