Expose canonical Filament extraction through PyO3 and WASM

[kreneskyp]

Goal

Expose the canonical Filament extraction engine through both the Python quire wheel and @agent-ix/quire-wasm.

Scope

• Add PyO3 binding for the new Filament extraction API.
• Add WASM binding with the same input/output contract.
• Include ObjectType snapshot input support equivalent to Python ExtractionContext.from_object_types(...).
• Keep bindings thin; no duplicate extraction policy in binding layers.

Acceptance

• Python and WASM bindings return equivalent JSON for the same fixtures.
• @agent-ix/quire-wasm exports the new API and has updated .d.ts.
• Existing parseDocument, extractFromBlob, and validateFromBlob behavior remains compatible.

Context

• Depends on the canonical engine issue.
• Parent IDE context: agent-ix/filament-ide#24.

[kreneskyp]

Depends on #9.