perf(server): lazy-load Pydantic schema generation to fix storyboard readiness flake#435

bokelley merged 2 commits intomainadcontextprotocol/adcp-client-python:mainfrom

claude/issue-412-lazy-pydantic-schema-initadcontextprotocol/adcp-client-python:claude/issue-412-lazy-pydantic-schema-initCopy head branch name to clipboard