[TCGC] Match JSON number example values to decimal/decimal128 properties

[Copilot]

JSON number values in example files were silently dropped for properties typed as decimal or decimal128 (e.g. threshold: decimal with example value 80), so they never appeared in the example value set surfaced by TCGC.

getSdkTypeExample in packages/typespec-client-generator-core/src/example.ts routed examples to the numeric branch only for isSdkIntKind / isSdkFloatKind. Fixed-point kinds (decimal, decimal128) belong to SdkFixedPointKindsEnum and fell through the switch, yielding undefined.

Changes

• interfaces.ts: Export the existing isSdkFixedPointKind predicate.
• example.ts: Include isSdkFixedPointKind(type.kind) in the numeric dispatch so decimal/decimal128 are handled like other numerics.
• Tests: Added SdkNumberExample for decimal and SdkNumberExample for decimal128 cases with corresponding fixture JSON files.

// Before
if (isSdkIntKind(type.kind) || isSdkFloatKind(type.kind)) {
  return getSdkBaseTypeExample("number", type, example, relativePath);
}

// After
if (isSdkIntKind(type.kind) || isSdkFloatKind(type.kind) || isSdkFixedPointKind(type.kind)) {
  return getSdkBaseTypeExample("number", type, example, relativePath);
}

[azure-sdk]

All changed packages have been documented.

• ✅ @azure-tools/typespec-client-generator-core

Show changes

@azure-tools/typespec-client-generator-core - fix ✏️

Fix reorderParameters, addParameter, removeParameter, and replaceParameter so that decorators copied to cloned model properties and cloned operations are applied (by calling finishType after cloning). This fixes scenarios such as parameters with @typeChangedFrom under a @versioned service.

@azure-tools/typespec-client-generator-core - fix ✏️

Fix example value matching for decimal and decimal128 typed properties. JSON number values in example files are now correctly recognized as matching decimal / decimal128 typed properties.

@azure-tools/typespec-client-generator-core - feature ✏️

Extend isExactName to additional SDK types whose names can be changed by @clientName: SdkClientType, SdkServiceMethodBase (and its derived method kinds), and SdkEnumValueType. Also fixed SdkClientType.name to strip the internal exact() marker.

[pkg-pr-new]

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npm i https://pkg.pr.new/@azure-tools/typespec-client-generator-core@4487

commit: fffcc51

[azure-sdk]

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