feat(python): use datetime.fromisoformat() for datetime values in wire tests

[tjb9dc]

Description

Refs: Slack thread from @tjb9dc

Updates the Python wire test generator to format datetime values using datetime.fromisoformat() instead of passing them as plain strings.

Before: datetime="2024-07-01T15:30:00+00:00"
After: datetime=datetime.datetime.fromisoformat("2024-07-01T15:30:00+00:00")

Changes Made

• Added import datetime to generated wire test files
• Added getPrimitiveType() helper to unwrap optional/nullable types and extract the underlying primitive type
• Modified formatValue() and jsonToPython() to accept type reference information
• When type is DATE_TIME, formats as datetime.datetime.fromisoformat("...")
• When type is DATE, formats as datetime.date.fromisoformat("...")
• Updated buildPathParameters, buildQueryParameters, buildHeaders, and buildRequestBody to pass type information from the dynamic IR

Testing

• TypeScript compilation passes
• Lint checks pass
• Seed tests with datetime fixtures (not run locally - CI will validate)

Human Review Checklist

• Verify type reference lookup logic correctly maps parameter names to their types
• Check handling of nested datetime values in objects (currently type info not propagated to nested object values)
• Confirm generated Python code is syntactically correct for datetime/date types

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Link to Devin run: https://app.devin.ai/sessions/6f4e456806ef4489adbf5e24aa2e449f
Requested by: @tjb9dc

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[tjb9dc]

Not necessary now that we are using dynamic snippets