[WIP] Add conformance checks and tests to reflection implementation

[Copilot]

• Inspect the generator, protocol template, and existing tests for special-member behavior
• Add focused conformance coverage for supported special members in the protocol generator/tests
• Run targeted verification for the updated tests and generator output
• Run final review, security checks, and report the completed minimal change set

• Fixes Add conformance checks and tests to the reflection implementation of protocol #127

[jbcoe]

@copilot address comments and fix failing tests.

pre-commit can be run locally with uv

[Copilot]

@copilot address comments and fix failing tests.

pre-commit can be run locally with uv

Fixed in commit Fix clang-format: use conforms_to_v variable template in requires clauses. The pre-commit clang-format hook was reformatting requires conforms_to<T, Concrete>() by splitting the () call onto its own line. Replaced with a conforms_to_v<T, Concrete> variable template (no trailing ()) which formats correctly.

[jbcoe]

@copilot For the constructor, use U, not Concrete as the type name.

For tests, check constructability, do not use an internal check.

[Copilot]

@copilot For the constructor, use U, not Concrete as the type name.

For tests, check constructability, do not use an internal check.

Done in commit Use U instead of Concrete in constructor templates; add constructability tests:

• Renamed Concrete → U in the constructor templates for both protocol and protocol_view
• Added ReflectionProtocolTest.IsConstructibleFromConformingType and ReflectionProtocolViewTest.IsConstructibleFromConformingType tests using std::is_constructible_v to check constructability from conforming/non-conforming types without relying on internal checks

[jbcoe]

@copilot rebase the branches for this PR so that it can be merged as a stack.

[Copilot]

@copilot rebase the branches for this PR so that it can be merged as a stack.

The local rebase onto reflection-impl/supported-special-members is complete and all 67 tests pass. However, the push tool cannot force-push a rebased branch (it tries to reconcile with the remote's old pre-rebase history and hits conflicts). A manual git push --force-with-lease origin copilot/jbcoe-127-add-conformance-checks is needed to publish the rebased history.