Merge branch 'upstream' into concedo_experimental

# Conflicts:
#	README.md
#	docs/backend/SYCL.md
#	ggml/CMakeLists.txt
#	ggml/src/ggml-cpu/repack.cpp
#	ggml/src/ggml-sycl/backend.hpp
#	ggml/src/ggml-sycl/common.hpp
#	ggml/src/ggml-sycl/convert.cpp
#	ggml/src/ggml-sycl/cpy.cpp
#	ggml/src/ggml-sycl/cpy.hpp
#	ggml/src/ggml-sycl/dequantize.hpp
#	ggml/src/ggml-sycl/fattn.cpp
#	ggml/src/ggml-sycl/fattn.hpp
#	ggml/src/ggml-sycl/ggml-sycl.cpp
#	ggml/src/ggml-sycl/mmvq.cpp
#	ggml/src/ggml-sycl/norm.cpp
#	ggml/src/ggml-sycl/norm.hpp
#	ggml/src/ggml-sycl/vecdotq.hpp
#	ggml/src/ggml-webgpu/ggml-webgpu-shader-lib.hpp
#	ggml/src/ggml-webgpu/ggml-webgpu.cpp
#	ggml/src/ggml-webgpu/wgsl-shaders/common_decls.tmpl
#	ggml/src/ggml-webgpu/wgsl-shaders/flash_attn.wgsl
#	ggml/src/ggml-webgpu/wgsl-shaders/flash_attn_quant_staging.tmpl
#	ggml/src/ggml-webgpu/wgsl-shaders/flash_attn_tile.wgsl
#	ggml/src/ggml-webgpu/wgsl-shaders/flash_attn_vec_split.wgsl
#	ggml/src/ggml-zendnn/CMakeLists.txt
#	ggml/src/ggml-zendnn/ggml-zendnn.cpp
#	scripts/sync-ggml.last
#	tests/CMakeLists.txt
#	tests/snapshots/qwen3.6-27b.schema
#	tests/test-autorelease.cpp
#	tests/test-backend-ops.cpp
#	tests/test-backend-sampler.cpp
#	tests/test-model-load-cancel.cpp
#	tests/test-quant-type-selection.cpp

common/common.cpp

@@ -1482,6 +1482,20 @@ std::string common_get_model_endpoint() {
     return model_endpoint;
 }
 
+char * common_get_model_or_exit(int argc, char * argv[]) {
+    if (argc > 1) {
+        return argv[1];
+    }
+
+    char * path = getenv("LLAMACPP_TEST_MODELFILE");
+    if (!path || strlen(path) == 0) {
+        fprintf(stderr, "\033[33mWARNING: No model file provided. Skipping this test. Set LLAMACPP_TEST_MODELFILE=<gguf_model_path> to silence this warning and run this test.\n\033[0m");
+        exit(EXIT_SUCCESS);
+    }
+
+    return path;
+}
+
 common_context_seq_rm_type common_context_can_seq_rm(llama_context * ctx) {
     auto * mem = llama_get_memory(ctx);
     if (mem == nullptr) {