refactor(safety): apply consistent formatting across services and tests

Improved code readability and uniformity by standardizing line breaks, indentation, and inline conditions across safety-related services, models, and tests, including content filters, validation rules, and emergency controls.

backend/tests/services/mcp/test_exceptions.py

@@ -160,11 +160,21 @@ class TestMCPToolNotFoundError:
         """Test tool not found with available tools listed."""
         error = MCPToolNotFoundError(
             "unknown-tool",
-            available_tools=["tool-1", "tool-2", "tool-3", "tool-4", "tool-5", "tool-6"],
+            available_tools=[
+                "tool-1",
+                "tool-2",
+                "tool-3",
+                "tool-4",
+                "tool-5",
+                "tool-6",
+            ],
         )
         assert len(error.available_tools) == 6
         # Should show first 5 tools with ellipsis
-        assert "available_tools=['tool-1', 'tool-2', 'tool-3', 'tool-4', 'tool-5']..." in str(error)
+        assert (
+            "available_tools=['tool-1', 'tool-2', 'tool-3', 'tool-4', 'tool-5']..."
+            in str(error)
+        )
 
 
 class TestMCPCircuitOpenError: