Migration Field Cleanup - Fix JCMA Duplicate Fields

Exactly what we needed after the migration, no more "(migrated)" field chaos. We just migrated our Jira Data Center instance to Cloud and came face-to-face with the dreaded "(migrated)" suffix problem. Over 47 duplicate custom fields cluttering our field configuration, some with "(migrated)", others with "(migrated 2)" or worse. I spent an afternoon manually matching them up before finding this app. It scanned everything, grouped the pairs by original field name, and showed me side-by-side comparisons with issue counts so I could see exactly what was affected. The safety classification made it easy to triage, I tried the preview on 12 fields first, then batched the rest. Cleared all 47 duplicates in about three hours instead of what would have been a multi-day headache. I had some trouble making it work on Team managed projects and the developer was fast to respond and help. If you're doing or planning a migration, grab this before you start, it will save you so much pain.