2.0.0.0-beta4

Added support for type TYPE (type of types), e.g. select get_type(42).
Added support for Ubuntu 26.10 and Debian 14.
Switched swoole code to std::atomic.
async_threads is now 0 by default to avoid resource shortage on many concurrent requests.
Improved error messages for transaction methods.
Improved code quality, removed unused code.
Added clang-format, clang-tidy and clang-coverage to CI.
Added more tests (now 94% line coverage).
Extended readme with supported CPU architectures.
Deactivated binary builds for Alpine Linux (GitLab Security issue).