Implement DS4 model intake

src/database.rs

@@ -341,7 +341,7 @@ impl Database {
         generation.validate()?;
         let model = crate::model::ModelChoice::from_id(selected_model)
             .ok_or_else(|| format!("Unsupported model: {selected_model}"))?;
-        runtime.engine_settings(model)?;
+        runtime.validate(model)?;
         let execution = &runtime.execution;
         let speculative = &runtime.speculative;
         let (ssd_cache_experts, ssd_cache_gib) = match runtime.ssd.cache {