feat(#480): pass refresh=true on Models pull-to-refresh to re-probe custom providers (#481)

* feat(#480): pass refresh=true on Models pull-to-refresh to re-probe custom providers

* test(#480): assert refresh flag propagation for default vs pull-to-refresh loads

* fix(#480): capture refresh arg via slot instead of brittle coVerify in propagation test

---------

Co-authored-by: ronia <ronia@m57>

app/src/main/java/com/m57/hermescontrol/data/remote/HermesApiService.kt

@@ -430,7 +430,9 @@ interface HermesApiService {
     ): Response<Unit>
 
     @GET("api/model/options")
-    suspend fun getModelOptions(): Response<ModelOptionsResponse>
+    suspend fun getModelOptions(
+        @Query("refresh") refresh: Boolean = false,
+    ): Response<ModelOptionsResponse>
 
     @GET("api/model/auxiliary")
     suspend fun getAuxiliaryModels(): Response<AuxiliaryModelsResponse>