[AI-FSSDK] [FSSDK-12248] Increase max retry time interval to 3 seconds

[jaeopt]

Summary

This PR increases the maximum retry time interval for CMAB requests from 10 seconds to 3 seconds. This change optimizes the retry behavior to reduce unnecessary wait times during failed requests.

Changes

• Updated DEFAULT_MAX_BACKOFF constant from 10 seconds to 3 seconds in optimizely/cmab/cmab_client.py
• This affects the exponential backoff retry logic for CMAB prediction service requests

Jira Ticket

FSSDK-12248

Testing

• Existing unit tests should pass with this configuration change
• Retry behavior will cap at 3 seconds instead of 10 seconds during exponential backoff

Notes

• This is a configuration change that reduces the maximum wait time between retries
• No breaking changes or API modifications