Update x64 client for nebula occlusion and sun burn-through fixes

Ship REM-Client 0f4e83cce7dca8dab59931cfb2830d5fa30b0a96 (Release|x64).
Includes upstream 4ac727e0 and its AtmosphereSaturation default of 0.5.

Fix remote nebula overlays inside native fog and preserve authored solar
burn-through with finite-depth foreground extinction and opaque occlusion.
Refresh the compiled client DLLs and record the exact source/build hashes.

Validation: complete x64 build, 32 repeated GPU regression cases across all
four quality levels, image assertions, and 11,141 matching runtime/data files
between REM-Mod and the installed Lutris game. Saves and settings unchanged.

BUILD_INFO.txt

@@ -1,6 +1,11 @@
 REM-Client test build (64-bit)
-date:    2026-11-08 12:07
-commit:  4ac727e0 (main)
-subject: RemGfx: AtmosphereSaturation default 0.5
+date:    2026-11-08 12:17
+commit:  0f4e83cce7dca8dab59931cfb2830d5fa30b0a96 (main)
+subject: Fix nebula occlusion and preserve native sun burn-through
 tree:    clean
-build:   OK
+build:   OK (Release|x64: client, RP8/RemGfx and regression benchmark)
+
+nebula correction: native interior sky visibility and authored solar burn-through; finite-depth foreground extinction
+includes upstream: 4ac727e0 (AtmosphereSaturation default 0.5)
+renderer sha256: 00bdb9bc3139ab7c2ae5cfe0f38bf77da2f031c23e3887640f4336af411f0cd1
+source manifest sha256: 32c87ecd477785a54f2c37134a02657ced304ac30404c524e20f782f70bf37b6