Add live-tunable GPS solver highway weight

docs/red4ext-logging-shim.md

@@ -66,12 +66,22 @@ Current behavior:
 
 Active build note:
 
-- The currently installed build is disabled on disk:
-  `EdgeWeightGPS.dll.disabled`. There is no active `EdgeWeightGPS.dll` in the
-  game plugin directory.
-- Source defaults are still read-only for route behavior. They disable provider
-  class multiplier overrides and the spatial edge-cost patch, while keeping GPS
-  query lifecycle tracing available for probe builds.
+- The currently installed build is active as
+  `red4ext/plugins/EdgeWeightGPS/EdgeWeightGPS.dll`.
+- Source defaults enable the stable inline solver-cost patch at `0x40bb98`
+  (`kEnableGpsNodeMultiplierInlinePatch = true`) and keep the old full-function
+  `0x40bb40` C++ detour disabled (`kEnableGpsMultiplierHooks = false`).
+- The inline patch preserves vanilla road cost except for highway lanes in the
+  road-tail branch. Highway lanes are multiplied by the live value in
+  `solver_weights.bin`, defaulting to `0.80`.
+- The patch is intentionally not hard-gated on `solver+0xc4 == 2`; the vanilla
+  branch already limits it to road-style modes `0/2/4`, which keeps manual
+  drive and autodrive-like callers from diverging while leaving pedestrian mode
+  `1` alone.
+- `solver_weights.bin` lives beside the DLL and is exactly one little-endian
+  float32. The plugin polls it every 500 ms from the Running game-state update.
+  `tools/write_solver_weights.py` writes the installed file or generates preset
+  binaries under `presets/solver_weights/`.
 - The async route-job hooks are split behind `kEnableGpsRouteJobLifecycleHooks`
   and are disabled in the active probe; this keeps the log focused on
   `0x70a42c` submissions, `0x7094b8` result records, and local