Release v8.0.0 - Into the Arena · puma/puma

Add env["puma.mark_as_io_bound"] API and max_io_threads config to allow IO-bound requests to exceed the thread pool max, enabling better handling of mixed workloads ([#3816], [#3894]) Add single and cluster DSL hooks for mode-specific configuration ([#3621]) Add on_force option to shutdown_debug to only dump thread backtraces on forced (non-graceful) shutdown ([#3671]) Add API to dynamically update min and max thread counts at runtime via update_thread_pool_min_max and ServerPluginControl ([#3658]) Use SIGPWR for thread backtrace dumps on Linux/JRuby where SIGINFO is unavailable ([#3829]).