fix: apply ruff formatter to health.py

Fix line-length violations in _check_database and _check_redis error
return statements to comply with ruff formatter requirements.

Author: LaphoqueRC

backend/app/api/health.py

@@ -47,11 +47,19 @@ async def _check_database() -> dict:
     except SQLAlchemyError as exc:
         latency_ms = round((time.monotonic() - start) * 1000)
         logger.warning("Health check DB failure: %s", exc)
-        return {"status": "unavailable", "latency_ms": latency_ms, "error": "connection_error"}
+        return {
+            "status": "unavailable",
+            "latency_ms": latency_ms,
+            "error": "connection_error",
+        }
     except Exception as exc:
         latency_ms = round((time.monotonic() - start) * 1000)
         logger.warning("Health check DB failure: %s", exc)
-        return {"status": "unavailable", "latency_ms": latency_ms, "error": "unexpected_error"}
+        return {
+            "status": "unavailable",
+            "latency_ms": latency_ms,
+            "error": "unexpected_error",
+        }
 
 
 async def _check_redis() -> dict:
@@ -67,11 +75,19 @@ async def _check_redis() -> dict:
     except RedisError as exc:
         latency_ms = round((time.monotonic() - start) * 1000)
         logger.warning("Health check Redis failure: %s", exc)
-        return {"status": "unavailable", "latency_ms": latency_ms, "error": "connection_error"}
+        return {
+            "status": "unavailable",
+            "latency_ms": latency_ms,
+            "error": "connection_error",
+        }
     except Exception as exc:
         latency_ms = round((time.monotonic() - start) * 1000)
         logger.warning("Health check Redis failure: %s", exc)
-        return {"status": "unavailable", "latency_ms": latency_ms, "error": "unexpected_error"}
+        return {
+            "status": "unavailable",
+            "latency_ms": latency_ms,
+            "error": "unexpected_error",
+        }
 
 
 async def _check_solana_rpc() -> dict: