Update x64 client for nebula quality, performance and sculpted shapes

Deploy REM-Client 8cbe4a7030259bb0ef71cc2089e1aa01325c7dd0 (Release|x64).
Includes four live detail profiles, continuous distant visibility, carved
bays and bent arms, shape-aware exclusions and conservative rendering
optimizations for weaker GPUs. Gameplay zone geometry remains unchanged.

Update the complete compiled client and record its committed source and
renderer hash in BUILD_INFO.txt. The same runtime is installed in Lutris;
all 11,141 audited runtime/data files match and saves were preserved.

Validated CPU/shader checks, 55 GPU regression cases and client startup.

BUILD_INFO.txt

@@ -1,6 +1,10 @@
-REM-Client test build (64-bit)
+REM-Client test build (64-bit)
-date:    2026-11-08 04:53
+date:    2026-11-08 09:52
-commit:  dc29f791 (main)
+commit:  8cbe4a7030259bb0ef71cc2089e1aa01325c7dd0 (main)
-subject: Planet atmospheres: the scattered light over the surface is weaker and mostly Earth's blue - AtmosphereDisc (0.35) of it where the view meets the surface squarely, fading to the full planet-coloured glow at the limb; the planet-coloured veil over the whole disc turned Br03_01 (olive) bright yellow even at a quarter of the density
+subject: Rework volumetric nebula quality, visibility and sculpted shapes
-tree:    clean
+tree:    clean (committed source; compiled bytes unchanged)
-build:   OK
+build:   OK (Release|x64: full client, incremental Freelancer and RP8/RemGfx)
+
+nebula update: quality profiles, continuous visibility, sculpted hulls and conservative empty-space skipping
+renderer sha256: 610c7ac4baac9aa6d5733cfcaf99f07cba60586d17a56d3d73ddfa3f3086f0cc
+source manifest sha256: e0d60d49ffa65c2f5a36aa7427cbde0ad0be56108d1850c9d1bd000d6fdf3f87