feat(leathercraft): ancient runic leather horse noseband bench engine

[angelTomo9]

Summary of Changes

Implements the Ancient Runic Leather Horse Noseband Bench, Mithril Nasal Bridge Splint Rig & Celestial Valkyrie Cavesson Sanctum Engine for OpenAO MMORPG.

Key Features

• Bench Models: Elder Noseband Bench, Runic Oak Noseband Rig, and Celestial Void Valkyrie Noseband Sanctum.
• Materials & Recipes: Raw tanned bull nasal straps, tempered mithril nasal bridge splints, and celestial void astral cavesson pads; novice expedition through sovereign valkyrie nosebands.
• Biomechanical Support: Independent steed mandibular control bonus ratings and nasal impact cushioning ratings with calibrated quality scaling.
• Production Integrity: Upfront material deduction on all attempts, immutable bench cloning for safe rollbacks on both craft and maintain operations, crypto-secure unit rolls strictly in [0, 1), and durability maintenance workflows.
• Unit Tests: 100% test coverage under Vitest suite (api/src/tests/ancientRunicLeatherHorseNosebandBench.test.ts, 7/7 tests passing).

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