fix: accept null arguments in tools/call and return -32602 for validation errors#2013

blackwell-systems wants to merge 3 commits intomodelcontextprotocol:mainmodelcontextprotocol/typescript-sdk:mainfrom

blackwell-systems:fix/null-arguments-internal-errorblackwell-systems/typescript-sdk:fix/null-arguments-internal-errorCopy head branch name to clipboard