Misc bugfixes and improvements (#14460)

* only save a fixed number of thumbnails if genai is enabled

* disable cpu_mem_arena to save on memory until its actually needed

* fix search settings pane so it actually saves to the config

frigate/util/model.py

@@ -85,8 +85,14 @@ class ONNXModelRunner:
         else:
             # Use ONNXRuntime
             self.type = "ort"
+            options = ort.SessionOptions()
+            if device == "CPU":
+                options.enable_cpu_mem_arena = False
             self.ort = ort.InferenceSession(
-                model_path, providers=providers, provider_options=options
+                model_path,
+                sess_options=options,
+                providers=providers,
+                provider_options=options,
             )
 
     def get_input_names(self) -> list[str]: