[wmedrano]

• Clear every registered callback on deactivate to prevent use-after-free
• Free RingBuffer when both reader and writer are dropped
• Handle NULL and non-UTF-8 keys in property change callbacks
• Return an error instead of panicking when a required JACK symbol is missing
• Declare variadic JACK functions as variadic in jack-sys
• Resolve optional JACK functions at runtime when statically linking
• Skip pkg-config when dynamic_loading is enabled and fix jack-sys default features
• Stop taking the client creation lock in connect_ports
• Reject NaN and infinite values in TransportBBT validation
• Export CodeOrMessage and contrib::ProcessCallbacks
• Remove deprecated APIs, make set_bbt_offset infallible, and document from_raw safety
• Fix incorrect documentation, resolve doc TODOs, and implement Client::set_freewheel
• Mark Error and TransportState non_exhaustive, drop unused error variants, and fix typos
• Derive common traits for ClientOptions and drop options that need variadic arguments
• Make NotificationHandler::shutdown a safe method
• Register the port rename callback and rename ports with jack_port_rename
• Accept both errno sign conventions from jack_midi_event_write
• Document that connected audio input and output buffers may alias
• Return errors instead of panicking on invalid strings and unexpected JACK values
• Stop calling handlers after Quit or panic, and keep slow-sync clients running when sync returns false
• Share CallbackContext across JACK threads instead of aliasing &mut
• Check callback registration results and close the client when activation fails
• Make tests independent of a shared client and of server timing
• Defer pthread cancellation inside JACK callbacks so PipeWire cannot abort the process
• Keep the client open for the duration of Port and Transport calls