Bug fixes and improvements

🐛 Bug Fixes

• SSL Error Reporting Improvements

• Fixed SSL error reporting in SSLClient (#2251)
• Enhanced error handling to properly capture OpenSSL errors when SSL context is null
• Added ssl_last_error() method to SSLServer for better error diagnostics

• SSL Client Certificate Authentication (#2250)

• Fixed SSL client certificate authentication issues
• Added proper client CA list handling during TLS handshake
• Implemented extract_ca_names_from_x509_store() helper function

• IPv6 Host Header Support (#2237)

• Fixed Host header formatting for IPv6 addresses
• Properly enclose IPv6 addresses in brackets when creating host strings
• Added make_host_and_port_string() utility function

• Memory Safety Fix (#2232)

• Fixed undefined behavior caused by dangling references in getaddrinfo_with_timeout()
• Resolved potential crashes when resolve thread is detached
• Added test to verify the fix

• EventDispatcher Stability (#2257)

• Fixed EventDispatcher problem
• Improved stability and reliability

• Threading Issues (#2255, #2256)

• Fixed multiple threading-related issues
• Enhanced thread safety and synchronization

🔧 Improvements

• Build System Enhancements

• CMake: Fixed FindBrotli to not add Brotli:: targets if they already exist (#2249)
• Meson: Use C++17 for gtest >= 1.17.0 (#2241)
• Fixed Windows cross-compilation issues (#2234)

• Windows Platform

• Fixed OpenSSL installation issues on Windows (#2254)
• Fixed benchmark test issue on Windows (#2258)
• Improved Windows environment compatibility

• Code Quality

• General code cleanup and improvements
• Fixed .gitignore for examples directory
• Added additional unit tests for SSL functionality