add warn about degraded quality

Author: ngxson

tools/mtmd/clip.cpp

@@ -2070,6 +2070,10 @@ struct clip_model_loader {
             LOG_INF("%s: ffn_op:             %s\n", __func__, log_ffn_op.c_str());
             LOG_INF("%s: model size:         %.2f MiB\n", __func__, model_size / 1024.0 / 1024.0);
             LOG_INF("%s: metadata size:      %.2f MiB\n", __func__, ggml_get_mem_size(ctx_meta.get()) / 1024.0 / 1024.0);
+
+            if (ctx_clip.proj_type == PROJECTOR_TYPE_LLAMA4) {
+                LOG_WRN("%s: llama 4 vision is known to have degraded quality: https://github.com/ggml-org/llama.cpp/pull/13282\n", __func__);
+            }
         }
     }