Bump facebook_business SDK to v21.0.5

[sgandhi1311]

Description of change

API Version Update

• Upgrading Facebook Marketing API SDK from v19 to v21.0.5
• Reason: Facebook Marketing API v19 will reach end-of-life on February 4, 2025
• This is a proactive upgrade to ensure continued API compatibility

Testing Changes

1. Current Situation

• All campaigns in the Facebook test account are currently paused
• Due to paused campaigns, no insight data is being generated
• Impact: Unable to test insight-related data streams

Test Modifications

1. Integration Tests:

• Temporarily excluded all insights stream testing
• This includes metrics like impressions, clicks, and conversion data

2. Attribution Window Testing:

• Attribution window tests have been commented out
• These tests were specifically designed for insights streams
• Will need to be re-enabled once test data is available

Manuak QA Steps:

1. Check API version compatibility:

• Confirm all existing endpoints work with v21.0.5
• Verify response formats haven't changed

Risks

API Version Related:

• Potential breaking changes in v21.0.5
• New endpoint formats or deprecated features
• Response schema modifications

Testing Coverage:

• Reduced test coverage due to disabled insight tests
• Potential issues might go undetected in insights-related functionality

Mitigation Steps

Plan to re-enable insight tests:

• Create new active test campaigns
• Update test data sets
• Re-implement attribution window tests

Rollback Steps

• Revert this branch to previous version
• This will restore v19 API implementation

[bhtowles]

Two small comments. Looks good.