feat(http-client-python): add encode/boolean Spector mock API tests + fix boolean-as-string encoding

[Copilot]

Adds Python SDK mock API test coverage for the encode/boolean Spector scenarios from #10875 (@encode(string) on boolean types). This required updating multiple layers of the Python codegen stack.

Generator fixes

types.ts — property emission
Preserves boolean @encode(string) metadata from the compiler and maps it to the Python runtime’s "str" format token.

primitive_types.py — BooleanType
Detects yaml_data["encode"] == "string" and sets self.encode = "str", mirroring IntegerType.

model_base.py.jinja2
Adds _deserialize_bool_as_str for case-insensitive string-to-boolean deserialization:

def _deserialize_bool_as_str(attr: str) -> bool:
    return attr.lower() == "true"

Also dispatches to it when annotation is bool and rf._format == "str".

Test coverage

Adds sync and async tests for Azure and unbranded clients covering:

• trueLower — "true" → True
• falseLower — "false" → False
• trueUpper — "TRUE" → True
• falseMixed — "FaLsE" → False

Dependencies

• Uses @typespec/compiler 1.14, which supports boolean @encode(string).
• Uses @typespec/http-specs 0.1.0-alpha.39, containing the encode/boolean scenarios.
• Adds encode/boolean to regenerate-common.ts.

Code diff:

Azure/azure-sdk-for-python#48067

[msyyc]

Need new compiler version to support this feature.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@typespec/http-client-python@11087

commit: 238985a

[github-actions]

All changed packages have been documented.

• ✅ @typespec/http-client-python

Show changes

@typespec/http-client-python - feature ✏️

Add mock API test coverage for @encode(string) on boolean properties (encode/boolean Spector scenarios). Fix Python generator to correctly serialize and deserialize boolean values encoded as strings (case-insensitive true/false)

[msyyc]

@copilot resolve the merge conflicts in this pull request

[azure-sdk-automation]

You can try these changes here

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[Copilot]

@copilot resolve the merge conflicts in this pull request

Resolved the conflicts with current main in merge commit 8c6548c58. The merged compiler metadata compatibility fix is in 646a638c7; all 16 targeted encode/boolean mock API tests pass.

[l0lawrence]

Code Diff qs: https://github.com/Azure/azure-sdk-for-python/pull/48067/changes#r3589123483,

[msyyc]

Code Diff qs: https://github.com/Azure/azure-sdk-for-python/pull/48067/changes#r3589123483,

replied