improvement(client-core-interfaces): revise JsonDeserialized recursion

[jason-ha]

Use OpaqueJsonDeserialized at recursion points for inexactly deserializable types instead of limited unrolling. Callers will need to use cast helper to resolve which will produce a repeatable pattern.

Update tests with case for class with private data in a recursive situation.

Internally, ancestor types are now explicitly limited to object types.

[Copilot]

Pull Request Overview

This PR revises the JSON deserialization recursion handling by introducing the OpaqueJsonDeserialized wrapper at recursion points to enable a more repeatable and maintainable deserialization pattern.

• Updated test cases to validate recursion handling for classes with private data and for symbol, unknown, and handle recursion.
• Modified internal utility types to remove explicit recursion limits in favor of ancestor type checks and conditional wrapping.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
packages/common/core-interfaces/src/test/testValues.ts	Adds a test object type with optional recursion using a class with private data.
packages/common/core-interfaces/src/test/jsonSerializable.spec.ts	Includes a new test case for private data in optional recursion.
packages/common/core-interfaces/src/test/jsonDeserialized.spec.ts	Updates several test cases to validate the new OpaqueJsonDeserialized handling.
packages/common/core-interfaces/src/exposedInternalUtilityTypes.ts	Refactors internal JSON deserialization utility types to use recursive ancestor type checks instead of a numeric recursion limit.

Comments suppressed due to low confidence (2)

packages/common/core-interfaces/src/exposedInternalUtilityTypes.ts:1191

• The updated handling in JsonDeserializedRecursion uses the TypeUnderRecursion flag to switch to OpaqueJsonDeserialized. Consider clarifying the doc comment to detail how this flag affects recursion detection and when the wrapper is applied.

JsonDeserializedImpl<T, Controls, true>

packages/common/core-interfaces/src/test/jsonDeserialized.spec.ts:1073

• Ensure that the new behavior when wrapping recursive class instances in OpaqueJsonDeserialized is thoroughly tested for edge cases, particularly for deeply nested recursions.

it("class instance in object with optional recursion", () => {