v0.5.16

What's Changed

• Serialize Jade discovery, connection setup, and teardown. A disconnect now cancels connection attempts that are in progress or queued, and a transport opened by a cancelled attempt is closed instead of leaked. A scan started while another lifecycle operation is running returns DeviceBusy.
• Bump jade-client-rs to d52ccd9, now sourced from synonymdev/jade-client-rs. The client closes transports after handshake or post-connect failures, bounds fragment and pinserver responses under absolute deadlines, rejects PSBTs without key origins, and releases serial descriptors on close.

Full Changelog: v0.5.15...v0.5.16