[github-actions]

Summary

Incremental TCGC documentation update covering source changes since the last run (checkout 9d5bfaac).

Doc-relevant changes analyzed

• SdkBuiltInType.wireType (interfaces/types): new property holding the built-in type a value is serialized as on the wire when @encode specifies a target encode-as type; string/url kinds can now be encoded as other built-in types.
• client-default-value-type-mismatch diagnostic: @clientDefaultValue now validates that the value type matches the target property/parameter type (or the @alternateType when present).
• New C# linter rules (csharp-model-suffix, csharp-use-standard-acronyms) and the reworded @operationGroup deprecation note — the auto-generated reference docs (reference/linter.md, reference/decorators.md) were already regenerated in the source PRs, so no further action was required.
• Type-only import refactors and test-only commits — no documentation impact.

Changes

• guideline.md: documented the new wireType property on the SdkBuiltInType bullet (emitter developer docs).
• 08types.mdx: added a "Value Type Validation" subsection under @clientDefaultValue describing the new diagnostic and how @alternateType affects validation.
• knowledge base: recorded lessons for wireType, the new diagnostic, the C# linter rules, and the @operationGroup doc-comment change.
• metadata: updated tcgc.meta.json to the checkout commit.

No versioned package content changed, so no changelog entry was added.

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