v0.1.12 — Phase 2 canon.lua single source-of-truth

Phase 2 of 14. canon.lua emitted from bible_parsed.json + v4 build mappings. 16 characters / 28 rooms / 10 scenes / 13 objects / 27 state_flags / 15 animations / 16 assets / 17 SFX / 5 music. canon.assert_id() helper for runtime guards (Phase 8).