Order same-core wake handoffs and remove Dread movie gates

Use guest runnable state after a higher-priority same-core wake instead of Mach dispatch state or a 5 ms cutoff. Honour wake handoffs for every game and remove Metroid Dread request-ring gates and its core_preempt setting.

Validate event, mutex and condition-variable handoffs with delayed host dispatch; 13 valid Dread movie-transition runs passed. Host tests, docs and shader-chain checks passed, along with an iOS syntax check. Record Wonder boot comparison and pending iOS runtime validation.

dm/games/010015100B514000/README.md

@@ -36,7 +36,7 @@ No game-specific executable cuts. No `dm/tools/sdk_patches.py` cut for its `sdk`
 
 - **Current:** 60 fps with a dynamic present interval. The game times every frame (`main+0xcfd24`); after a frame that ran past one vertical sync it sets present interval 2 for the next frame and sets its own time step to the interval (a float at `main+0x36ceff0`), so that frame catches up 2/60 s (Mario 1.2.1 on the iPhone). A user's 2-minute iPhone session switched 123 times, mostly for one frame.
 - **Resolved:** in `display` mode those frames were shown for 16.7 ms and the game visibly jumped ahead ("sometimes the speed increases when jumping"). In `game` mode (the default since 2026-10-15) the display link keeps a frame whose period is over 25 ms on screen for its whole period (`g_link_hold_until` in `nvn_mtl.m`), and the 30 fps target waits until interval 2 has held for a full second (`nvn_game_fps` in `hle_nvn.c`), so one-frame switches no longer flip the display-link mode. `DM_TEST_PRESENT_LAG=90,30` (30 ms before every 90th present) makes Mario do this on the Mac; run it with `DM_WINDOW=1` to get the display link.
-- `core_preempt` stays off: with it Mario's loader threads waited for busy decompression threads and its first frame moved from 0.6 to 2.9 s.
+- `core_preempt` stays off: with it Mario's loader threads waited for busy decompression threads and its first frame moved from 0.6 to 2.9 s. The shared [wake-triggered handoff](../../../docs/reference/threads.md#same-core-wake-handoffs) applies with it off: a 2026-10-26 boot smoke check reached the first frame in 1.36–1.56 s versus 1.31–1.50 s with the old host (three fresh saves each, no current shader libraries; this checks startup scheduling, not rendering performance). Logs are in the NSP work folder's `wake-handoff-check/`.
 - The precise `SleepThread` (`sleep_precise`, found on Metroid Dread) took Mario's frame-time p95 from 19.7 to 18.4 ms.
 - The spin-wait rewrite finds 175 loops in `main`; the store rule added one more in each build.