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/validation/validator.py

@@ -113,7 +113,9 @@ class ActionValidator:
         self._rules.append(rule)
         # Re-sort by priority (higher first)
         self._rules.sort(key=lambda r: r.priority, reverse=True)
-        logger.debug("Added validation rule: %s (priority %d)", rule.name, rule.priority)
+        logger.debug(
+            "Added validation rule: %s (priority %d)", rule.name, rule.priority
+        )
 
     def remove_rule(self, rule_id: str) -> bool:
         """