- Fix unchecked error return in CreateIssues ROLLBACK (errcheck)
- Reduce cyclomatic complexity of CreateIssues from 28 to ~10 (gocyclo)
- Extract validateBatchIssues helper for validation phase
- Extract generateBatchIDs helper for ID generation
- Extract bulkInsertIssues helper for issue insertion
- Extract bulkRecordEvents helper for event recording
- Extract bulkMarkDirty helper for dirty marking
All refactored helpers maintain the same functionality and transaction safety.
Follows the same pattern used in main.go complexity reduction.
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