## Summary
- Migrate to Java 21 LTS (from Java 17)
- Update qqq-bom-pom dependency to 0.35.0
- Update JUnit BOM to 5.12.1
- Update qqq-orb to 0.5.0
## Test plan
- [ ] CI validates build with Java 21
- [ ] Verify Maven Central publishing on tag
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Summary
Test plan