perf: add schema caching to avoid repeated reflection#685

SamMorrowDrums wants to merge 3 commits intomodelcontextprotocol:mainmodelcontextprotocol/go-sdk:mainfrom

SamMorrowDrums:perf/phase1-schema-cacheSamMorrowDrums/go-sdk:perf/phase1-schema-cacheCopy head branch name to clipboard