Retry behavior

Configure retry behavior for operations:

asyncapi.yml
1operations:
2 sendCriticalAlert:
3 action: send
4 channel:
5 $ref: '#/channels/alerts'
6 x-fern-retry:
7 max_attempts: 3
8 exponential_backoff: true
9 initial_delay: 1000
10 max_delay: 30000