* Started with main project. * Temporary. * Simplified type registry. * More tests and thread safety. * Update dockerfile and OpenApi. * Add missing class. * Update dependencies and OpenAPI * Fix naming in tests * Fix Squid/SquidMiddleware.cs * OpenAPI fixes. * Remove useless locks. * Fix serializer. * Usings simplified. * Fix type names. * Changelog for 7.3. * Fix tests * Fix tests * Another fix for tests