Upgrade llama.cpp to b9829; add DRY sampling parameters #473

Job	Run time
Start gate (abort window)	4s
Code style (spotless) + package graph	1m 19s
C++ Tests Ubuntu Latest x86_64	6m 5s
Build WebUI assets (shared)	1m 22s
Test (vmlens interleavings)	1m 6s
Cross-Compile Android aarch64	2m 7s
Build and Test macOS 15 arm64 (no Metal)	6m 27s
Cross-Compile manylinux2014 x86_64	1m 51s
Build and Test Linux aarch64	2m 13s
Build and Test Windows 2025 x86_64 (VS 2026)	6m 31s
Cross-Compile Android aarch64 (OpenCL/Adreno)	1m 57s
Build and Test Windows 2025 x86 (Ninja Multi-Config + sccache, eval)	3m 54s
Cross-Compile manylinux_2_28 x86_64 (CUDA)	6m 39s
Build and Test macOS 15 arm64 (Metal)	6m 27s
Build and Test Windows 2025 x86 (VS 2026)	6m 33s
Build and Test macOS 14 arm64 (Metal)	6m 27s
Build and Test Windows 2025 x86_64 (Ninja Multi-Config + sccache, eval)	3m 9s
Java Tests Ubuntu Latest x86_64	4m 32s
Java Tests Windows 2025 x86_64 (Ninja, eval)	1m 21s
Java Tests macOS 15 arm64 (Metal)	1s
Java Tests macOS 15 arm64 (no Metal)	1s
Java Tests macOS 14 arm64 (Metal)	1s
Java Tests Windows 2025 x86_64 (VS 2026)	1s
Package JARs	1s
Check: main branch / SNAPSHOT	1s
Check: v* tag	1s
Report	1s
Publish Release to Central	1s
Publish Snapshot to Central	1s
Update Snapshot Pre-release on GitHub	1s
Attach Signed Binaries to GitHub Release	1s
	1h 10m 16s

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