SDK v2 compatibility and calculator help caching
- Protocol revision 2026-07-28 support while retaining 2025-era clients
- Strict root tool inputs and advertised structured error envelopes
- Public 24-hour cache hint for calculator://help
- Bun 1.4 container, supply-chain gates, scaffold metadata, and framework tooling
- deps: @cyanheads/mcp-ts-core ^0.10.10 → ^0.12.3