chore(release): bump workspace version to 0.15.0

MINOR, not patch: 44 commits since v0.14.0 split 21 features / 19 fixes, and
/api/v1 gained the per-scanner library-toggle endpoints (additive, already
regenerated into api/openapi.json by c2bba134). sdk-publish pushes this version
to consumers, so a patch bump would understate a new API surface to anyone
pinning ~0.14.

Headline work is the desktop clients drawing level with the Apple revamp: the
Windows client picked up settings parity, a findable console UI in the header,
the shared clipboard (with a per-host toggle), PyroWave decode in the codec
picker, and D3D11VA-first decode + HDR pass-through on Intel; the Linux GTK4
client got the same category-map settings rebuild. Apple landed the intent-based
presenter rebuild and the Dynamic Island redesign. Also: the punktfunk-host
plugins CLI, per-scanner library toggles in the console, and PyroWave raw-dmabuf
zero-copy capture on the Linux NVIDIA host.

Notable fixes: LTR-RFI loss recovery under sustained loss, two encode teardown
memory-safety holes, the audio first-open retry that was leaving sessions
silent, and the GameStream stream-marker announcement on the compat plane.

Every workspace crate is on version.workspace = true, so this stayed a one-line
bump plus the lock sync. (fec-rs, pf-driver-proto, usbip-sim, the Windows driver
crates and pf-vkhdr-layer are deliberately versioned independently and stay put.)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

api/openapi.json

@@ -10,7 +10,7 @@
       "name": "MIT OR Apache-2.0",
       "identifier": "MIT OR Apache-2.0"
     },
-    "version": "0.14.0"
+    "version": "0.15.0"
   },
   "paths": {
     "/api/v1/clients": {