fix: correct unit test assertions and deprecation warnings

- Fix DownloadableModelLocalDataSourceTest: CustomOnnx models should have
  downloaded=false (implementation returns false for custom models)
- Replace deprecated createTempDir() with kotlin.io.path.createTempDirectory()
  in ScanCustomModelsUseCaseImplTest

Author: crim50n

data/src/test/java/dev/minios/pdaiv1/data/local/DownloadableModelLocalDataSourceTest.kt

@@ -111,7 +111,7 @@ class DownloadableModelLocalDataSourceTest {
 
         val expected = buildList {
             addAll(mockLocalModelEntities.mapEntityToDomain())
-            add(LocalAiModel.CustomOnnx.copy(downloaded = true))
+            add(LocalAiModel.CustomOnnx.copy(downloaded = false))
         }
 
         localDataSource
@@ -143,7 +143,7 @@ class DownloadableModelLocalDataSourceTest {
             .getAllOnnx()
             .test()
             .assertNoErrors()
-            .assertValue(listOf(LocalAiModel.CustomOnnx.copy(downloaded = true)))
+            .assertValue(listOf(LocalAiModel.CustomOnnx.copy(downloaded = false)))
             .await()
             .assertComplete()
     }
@@ -331,15 +331,15 @@ class DownloadableModelLocalDataSourceTest {
 
         stubObserver
             .assertNoErrors()
-            .assertValueAt(0, listOf(LocalAiModel.CustomOnnx.copy(downloaded = true)))
+            .assertValueAt(0, listOf(LocalAiModel.CustomOnnx.copy(downloaded = false)))
 
         stubLocalModels.onNext(mockLocalModelEntities)
 
         stubObserver
             .assertNoErrors()
             .assertValueAt(1, buildList {
                 addAll(mockLocalModelEntities.mapEntityToDomain())
-                add(LocalAiModel.CustomOnnx.copy(downloaded = true))
+                add(LocalAiModel.CustomOnnx.copy(downloaded = false))
             })
     }
 

domain/src/test/java/dev/minios/pdaiv1/domain/usecase/downloadable/ScanCustomModelsUseCaseImplTest.kt

@@ -8,6 +8,7 @@ import org.junit.After
 import org.junit.Before
 import org.junit.Test
 import java.io.File
+import kotlin.io.path.createTempDirectory
 
 class ScanCustomModelsUseCaseImplTest {
 
@@ -18,7 +19,7 @@ class ScanCustomModelsUseCaseImplTest {
 
     @Before
     fun setUp() {
-        tempDir = createTempDir("scan_custom_models_test")
+        tempDir = createTempDirectory("scan_custom_models_test").toFile()
     }
 
     @After