Refactor AcBinaryHubProtocol for thread safety
- Removed shared _currentHeaderContext; header context is now passed as a parameter through Parse* and ReadArguments/ReadSingleArgument methods, and stored per-binder for chunked messages.
- Updated AyCodeBinaryHubProtocol to use the new header context flow for type resolution and argument deserialization.
- Added concurrency tests to verify protocol instance safety under multi-threaded use and prevent state corruption or type resolution races.
- Improved documentation and comments to clarify the stateless, concurrency-safe design.
Full SignalR client→hub→service test infrastructure with testable components that bypass real network connections.
Key Files
SignalRClientToHubTest.cs — Abstract round-trip test base. Tests: Post_SingleInt, Post_TwoInts, Post_Bool, Post_String, Post_Guid, Post_Enum, and more.
TestableSignalRClient2.cs — AcSignalRClientBase implementation: direct hub calls, zero network, zero delays.