Verifies that the per-page Resource dictionary inheritance implementation
is complete and correct. All acceptance criteria are met:
- 3-level resource inheritance test passes
- Per-key override test passes
- /Resources missing on page inherits parent's
- Arc<ResourceDict> sharing verified with Arc::ptr_eq
- ColorSpace inline-array test passes
- Empty root /Resources propagates correctly
- INV-8 maintained (all fuzz tests pass)
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
