Add bulk update functionality for metric verification status, allowing multiple
metrics to be updated in a single API call with efficient batch processing. This
implementation includes:
- New handler for processing bulk updates with concurrent execution
- Batch processing with customizable batch size (default 50)
- Comprehensive error handling with client-friendly error codes
- REST endpoint with request validation and rate limiting
- Unit and integration tests for success and error cases
- Performance testing with different batch sizes
Addresses ticket BUS-1070.
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Co-Authored-By: Claude <noreply@anthropic.com>
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