feat(core,clients): one rumble policy engine for every platform (rumble root fix D)

punktfunk-core client/rumble.rs: a per-connection policy engine consumes seq-gated wire
updates and emits EFFECTIVE actuator commands — re-emits on renewals (duration APIs stay
re-armed), self-silences at the v2 lease, a UNIFORM 1 s legacy-host staleness replacing the
per-platform zoo (Apple 1.6 s / Android 60 s / SDL 1.5 s / Deck 1 s), quirk-declared
actuator keepalives (Deck 40 ms + LSB dedupe-defeat jitter), and one stop per buzzing pad
on connection close. Per-pad mailbox semantics: a stalled embedder wakes to ONE current
command, and a stop can structurally never be the update an overflowing queue drops.

New API/ABI: NativeClient::{next_rumble_command,set_rumble_quirks} +
punktfunk_connection_next_rumble_cmd/_set_rumble_quirks (next_rumble/next_rumble2 stay for
un-migrated embedders; both consumers are fed). Migrations DELETE the platform forks:
pf-client-core loses RumbleState + the Deck keepalive loop + LEGACY_RUMBLE_CEILING_MS and
physically silences a slot at close; Android loses the 60 s legacy one-shot (backstop
repack, cancel-on-zero); Apple loses envelopeDeadline + sessionStaleSeconds + both tick
watchdogs (CoreHaptics realization untouched; mac xcframework rebuilt locally).

design/rumble-root-fix.md par. D. Engine 10/10 unit tests; core tests 176 Linux / 175
Windows + clippy -D warnings; swift build + RumbleTuningTests; Kotlin + android-native
compile green.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

crates/punktfunk-core/src/client/worker.rs

@@ -27,6 +27,9 @@ pub(crate) struct WorkerArgs {
     pub(crate) frames: Arc<FrameChannel>,
     pub(crate) audio_tx: SyncSender<AudioPacket>,
     pub(crate) rumble_tx: SyncSender<RumbleUpdate>,
+    /// Feed half of the rumble policy engine — its `Drop` (demux task end) marks the engine
+    /// closed, so the command API always observes connection teardown.
+    pub(crate) rumble_feed: super::rumble::RumbleFeed,
     pub(crate) hidout_tx: SyncSender<HidOutput>,
     pub(crate) hdr_meta_tx: SyncSender<HdrMeta>,
     pub(crate) host_timing_tx: SyncSender<crate::quic::HostTiming>,