fix: reject non-JSON Content-Type with 415 and validate protocol version header on initialize#968

suryateja-g13 wants to merge 2 commits into

modelcontextprotocol:mainmodelcontextprotocol/java-sdk:mainfrom

suryateja-g13:fix/961-content-type-validationsuryateja-g13/java-sdk:fix/961-content-type-validationCopy head branch name to clipboard