+ feat: support MCP batch operations

[baocang]

Summary

• expose ids and batchFailFast for MCP module tools that support get, update, or delete
• reject conflicting or invalid batch input before authentication
• execute a shared update payload across multiple IDs while keeping workflow actions single-object
• return aggregate success, partial, or fail status with structured results, errors, and skipped IDs
• mark an all-failed batch as an MCP tool error

Verification

• bun run typecheck
• bun test (189 tests, 501 assertions)
• bun run build
• git diff --check