Activate Bun.Transpiler tsconfig lifetime corpus

Home already carries Bun JSTranspiler tsconfig ownership semantics, but the current upstream js/bun/transpiler/transpiler-tsconfig-uaf.test.ts fixture is still replaced with a synthetic TODO. Activating it exposes a native corpus bridge gap: tsconfig JSX mode and pragma fields are dropped, so repeated transforms ignore jsxFactory, jsxFragmentFactory, and jsxImportSource.

Acceptance criteria:

• execute the unmodified current Bun fixture instead of a TODO
• preserve tsconfig state across repeated async and sync transforms
• carry JSX runtime, factory, fragment, and import source into real parser options
• clean up partially constructed native handles on every failure path
• pass the exact fixture (3/3) and the complete home_test gate

This is the next bounded porting slice under #66 and #81.

Completed and pushed to main in 4524ded (feat(test): activate transpiler tsconfig lifetime corpus).

What landed:

• activated the unmodified current Bun transpiler-tsconfig-uaf.test.ts fixture
• preserved tsconfig JSX runtime, factory, fragment factory, and import source on the persistent native transpiler handle
• applied those values through the real parser JSX pragma options
• made partial native-handle construction cleanup deterministic on every callback failure path
• added a repository regression that executes the full upstream fixture

Verification:

• exact upstream fixture: 3 passed, 0 failed, 0 unsupported, 0 todo
• debug build: passed
• Zig formatting and diff checks: passed
• complete home_test gate: passed with zero failures

Commit author and committer are Chris chrisbreuer93@gmail.com; no coauthors.