SYCL build fails on Intel Arc A770 (Alchemist) - v0.1.40.1 #1248

Building the SYCL engine on CachyOS with an Intel Arc A770 (Alchemist) fails with multiple errors.

Environment:

• OS: CachyOS (Arch-based)
• Kernel: 7.2.6-1-cachyos
• GPU: Intel Arc A770 (DG2/Alchemist)
• Driver: xe (Kernel driver in use: xe)
• oneAPI DPC++/C++ Compiler: 2026.1.1
• Strata version: v0.1.40.1 (commit 82f46a8)

Build command:
cmake -S sycl -B build-sycl -G Ninja -DCMAKE_C_COMPILER=icx -DCMAKE_CXX_COMPILER=icpx -DSTRATA_SYCL_PARITY=OFF
cmake --build build-sycl --target strata

Errors (from build log):

1. fused_gr.dp.cpp:
   /home/javal/Strata/sycl/src/kernels/cuda/fused_gr.dp.cpp:1607:6: error: functions that differ only in their return type cannot be overloaded
   (definition is void, header declares bool)

2. expert_source.cpp:
   /home/javal/Strata/sycl/src/core/expert_source.cpp:2938:14: error: call to 'load_experts_gguf' is ambiguous
   (two conflicting definitions)

Full build log: (attach /tmp/strata_build_v0140.log)

The Alchemist (A770) architecture is not listed as tested in docs/INTEL_ARC.md. It seems the SYCL port has compilation issues that are specific to this architecture.