feat(protocol): establish deterministic Engine Protocol schema

[Dencyuman]

Summary

• establish the language-neutral Engine Protocol schema dialect and deterministic Go/TypeScript generation pipeline
• publish closed compile/handshake wire contracts, canonical codecs, cross-language fixtures, View address semantics, bounded recursive validation, and fail-closed Ajv parity
• enforce typed Query/View/Export recipe authority, identity and ownership invariants, exact locally derivable dependencies, effective automatic Relation columns, and deterministic normalized artifact publication
• align compiler, generated Go/TypeScript codecs, and independent Ajv authority for canonical string and datetime formats
• make generated-file verification deterministic and offline-safe, including schema-closure digests and packaged protocol checks

Validation

• COREPACK_ENABLE_NETWORK=0 NODE_VERSION=24.18.0 /Users/dencyu/.nvm/nvm-exec make ci
• 986 TypeScript/Ajv protocol tests, 0 failures
• Go race, conformance, integration, packaged, vulnerability, license, and deterministic generation gates
• 94.9% overall Go coverage and 90.1% patch coverage

Closes #27

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