Watchdog fires when Smart Area Reclaim widget performs wide-area scan on recoil_2026.07.04 + NVIDIA 616.56

**Describe the bug**

In engine build `recoil_2026.07.04`, the main-thread watchdog fires and kills the game ~50 minutes into a match when the Smart Area Reclaim widget (`beyond-all-reason/bar_widgets/gui_smart_reclaim.lua`) performs a wide-area scan. The widget code itself is unchanged — the regression appears to be in how this engine build handles the scan in combination with new NVIDIA drivers (driver `32.0.16.1656`, Aug 20 2026). Same widget on engine build `recoil_2026.06.12` does not trigger the watchdog.

**Reproduction**

1. BAR launcher → engine recoil_2026.07.04 (current bundled version)
2. Enable the Smart Area Reclaim widget from `beyond-all-reason/bar_widgets`
3. Play a wide-reclaim map (confirmed on "All That Glitters v2.2.3")
4. At roughly the 45–50 minute mark, a teammate selects a wide reclaim area
5. Main thread blocks on the widget's reclaim scan for ~30+ seconds
6. Watchdog fires; game dies

**Log signature**

```
[Smart Area Reclaim] Warning: Smart reclaim area is too large, limiting size (repeating every few minutes leading up to crash)
[t=00:48:13.789421] Warning: [Watchdog] Hang detection triggered for Spring 2026.07.04.
[t=00:48:13.789507] Warning: (in threads: {main,load,audio,vfsi}={1,0,0,0})
```

The `main=1` line is the engine flagging the **main thread** as the one waiting, not load/audio/vfsi. That points squarely at the Lua-side widget scan blocking the main thread — but on the previous engine build the same scan completes inside the frame budget.

**Expected behavior**

Watchdog should not trigger on widget-driven reclaim scans. Either:

1. The widget's scan should be moved off the main thread, **or**
2. The engine should expose a way for widgets to yield during wide-area scans (so the main thread isn't blocked), **or**
3. The engine should increase the watchdog timeout when the main thread is in a known-Lua yield state.

**Actual behavior**

Game crashes to desktop after the watchdog fires.

**System info**

- OS: Windows 11
- GPU: NVIDIA GeForce RTX 5070 Ti Laptop GPU
- Driver: 32.0.16.1656 (Aug 20 2026)
- BAR: Beyond All Reason test-31177-b64aa4e
- Engine: recoil_2026.07.04
- Map: All That Glitters v2.2.3
- Widget: gui_smart_reclaim.lua (from beyond-all-reason/bar_widgets)
- infolog.txt attached

**Cross-reference**

Filed the widget-side report at beyond-all-reason/bar_widgets — same user, same infolog.

**Workaround**

Disable Smart Area Reclaim widget. Game stable for 60+ minutes after that.

Start with the watchdog log signature and the scan in beyond-all-reason/bar_widgets/gui_smart_reclaim.lua, then compare behavior between recoil_2026.07.04 and recoil_2026.06.12 using the attached infolog. Investigate how the engine handles the widget's wide-area scan and main-thread waiting. Done means wide reclaim scans no longer trigger the watchdog or crash the game under the reported setup.

Written by the indexing model from the issue text.