fix: Detect and handle circular $ref in _dereference_schema
#117
| Job | Run time |
|---|---|
| 7s | |
| -1s | |
| -1s | |
| -1s | |
| 4s |
$ref in _dereference_schema
#117
| Job | Run time |
|---|---|
| 7s | |
| -1s | |
| -1s | |
| -1s | |
| 4s |