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/app/services/safety/guardian.py

@@ -266,9 +266,7 @@ class SafetyGuardian:
 
         except SafetyError as e:
             # Known safety error
-            return await self._create_denial_result(
-                action, [str(e)], audit_events
-            )
+            return await self._create_denial_result(action, [str(e)], audit_events)
         except Exception as e:
             # Unknown error - fail closed in strict mode
             logger.error("Unexpected error in safety validation: %s", e)
@@ -391,7 +389,9 @@ class SafetyGuardian:
         if action.tool_name:
             for pattern in policy.denied_tools:
                 if self._matches_pattern(action.tool_name, pattern):
-                    reasons.append(f"Tool '{action.tool_name}' denied by pattern '{pattern}'")
+                    reasons.append(
+                        f"Tool '{action.tool_name}' denied by pattern '{pattern}'"
+                    )
                     return GuardianResult(
                         action_id=action.id,
                         allowed=False,
@@ -419,7 +419,9 @@ class SafetyGuardian:
         if action.resource:
             for pattern in policy.denied_file_patterns:
                 if self._matches_pattern(action.resource, pattern):
-                    reasons.append(f"Resource '{action.resource}' denied by pattern '{pattern}'")
+                    reasons.append(
+                        f"Resource '{action.resource}' denied by pattern '{pattern}'"
+                    )
                     return GuardianResult(
                         action_id=action.id,
                         allowed=False,