api.main: fix pycodestyle error for /metrics endpoint
#2155
| Job | Run time |
|---|---|
| 3s | |
| 1m 54s | |
| 2m 36s | |
| 4m 33s |
/metrics endpoint
#2155
| Job | Run time |
|---|---|
| 3s | |
| 1m 54s | |
| 2m 36s | |
| 4m 33s |