feat(resolve): TS fresh-instance binding + decorator CALLS edges (R2 parity)

[smochan]

Summary

Track B2, stacked on #67. Closes two more items from the README's deferred 'TypeScript R2 patterns':

• Fresh-instance binding: new UserService().getUser(id) now emits CALLS to both the method AND the class (metadata fresh_instance: true). Conservative: only when the method edge resolved and the constructor resolves to a CLASS node — factory().run() correctly does not produce a class edge.
• TS decorator CALLS edges: @Injectable() / @Get(':id') (NestJS-style) emit CALLS edges with decorator: true + captured args, mirroring the Python parser's _emit_decorator_calls conventions. Handles exported-class decorator placement and byte-offset sibling matching (tree-sitter node identity quirk).

Implemented by a Sonnet subagent against a Fable spec; reviewed (idempotency, Python-overlap dedupe, guard conditions) by the orchestrating session.

Test plan

• 4 new tests (fresh-instance positive/negative, decorators in-repo resolve + stay-unresolved)
• Full suite 724 passed incl. resolver idempotency; ruff + mypy --strict clean
• cross-stack-demo: zero regression (demo has no NestJS/fresh-instance patterns — new edges only fire where the patterns exist)

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