fix: update test fixtures for SQLite storage migration

All store tests were passing file paths instead of Database objects
after the JSON-to-SQLite migration. Updated fixtures to create temp
Database instances, rewrote backup e2e tests for binary .db format,
and fixed config tests for the simplified StorageConfig.

server/tests/conftest.py

@@ -5,6 +5,7 @@ from datetime import datetime, timezone
 import pytest
 
 from wled_controller.config import Config, StorageConfig, ServerConfig, AuthConfig
+from wled_controller.storage.database import Database
 from wled_controller.storage.device_store import Device, DeviceStore
 from wled_controller.storage.sync_clock import SyncClock
 from wled_controller.storage.sync_clock_store import SyncClockStore
@@ -37,12 +38,25 @@ def test_config_dir(tmp_path):
 
 @pytest.fixture
 def temp_store_dir(tmp_path):
-    """Provide a temp directory for JSON store files, cleaned up after tests."""
+    """Provide a temp directory for store files, cleaned up after tests."""
     d = tmp_path / "stores"
     d.mkdir(parents=True, exist_ok=True)
     return d
 
 
+# ---------------------------------------------------------------------------
+# Database fixture
+# ---------------------------------------------------------------------------
+
+
+@pytest.fixture
+def tmp_db(tmp_path):
+    """Provide a temporary SQLite Database instance."""
+    db = Database(tmp_path / "test.db")
+    yield db
+    db.close()
+
+
 # ---------------------------------------------------------------------------
 # Config fixtures
 # ---------------------------------------------------------------------------
@@ -55,20 +69,7 @@ def test_config(tmp_path):
     data_dir.mkdir(parents=True, exist_ok=True)
 
     storage = StorageConfig(
-        devices_file=str(data_dir / "devices.json"),
-        templates_file=str(data_dir / "capture_templates.json"),
-        postprocessing_templates_file=str(data_dir / "postprocessing_templates.json"),
-        picture_sources_file=str(data_dir / "picture_sources.json"),
-        output_targets_file=str(data_dir / "output_targets.json"),
-        pattern_templates_file=str(data_dir / "pattern_templates.json"),
-        color_strip_sources_file=str(data_dir / "color_strip_sources.json"),
-        audio_sources_file=str(data_dir / "audio_sources.json"),
-        audio_templates_file=str(data_dir / "audio_templates.json"),
-        value_sources_file=str(data_dir / "value_sources.json"),
-        automations_file=str(data_dir / "automations.json"),
-        scene_presets_file=str(data_dir / "scene_presets.json"),
-        color_strip_processing_templates_file=str(data_dir / "color_strip_processing_templates.json"),
-        sync_clocks_file=str(data_dir / "sync_clocks.json"),
+        database_file=str(data_dir / "test.db"),
     )
 
     return Config(
@@ -84,33 +85,33 @@ def test_config(tmp_path):
 
 
 @pytest.fixture
-def device_store(temp_store_dir):
-    """Provide a DeviceStore backed by a temp file."""
-    return DeviceStore(temp_store_dir / "devices.json")
+def device_store(tmp_db):
+    """Provide a DeviceStore backed by a temp database."""
+    return DeviceStore(tmp_db)
 
 
 @pytest.fixture
-def sync_clock_store(temp_store_dir):
-    """Provide a SyncClockStore backed by a temp file."""
-    return SyncClockStore(str(temp_store_dir / "sync_clocks.json"))
+def sync_clock_store(tmp_db):
+    """Provide a SyncClockStore backed by a temp database."""
+    return SyncClockStore(tmp_db)
 
 
 @pytest.fixture
-def output_target_store(temp_store_dir):
-    """Provide an OutputTargetStore backed by a temp file."""
-    return OutputTargetStore(str(temp_store_dir / "output_targets.json"))
+def output_target_store(tmp_db):
+    """Provide an OutputTargetStore backed by a temp database."""
+    return OutputTargetStore(tmp_db)
 
 
 @pytest.fixture
-def automation_store(temp_store_dir):
-    """Provide an AutomationStore backed by a temp file."""
-    return AutomationStore(str(temp_store_dir / "automations.json"))
+def automation_store(tmp_db):
+    """Provide an AutomationStore backed by a temp database."""
+    return AutomationStore(tmp_db)
 
 
 @pytest.fixture
-def value_source_store(temp_store_dir):
-    """Provide a ValueSourceStore backed by a temp file."""
-    return ValueSourceStore(str(temp_store_dir / "value_sources.json"))
+def value_source_store(tmp_db):
+    """Provide a ValueSourceStore backed by a temp database."""
+    return ValueSourceStore(tmp_db)
 
 
 # ---------------------------------------------------------------------------