refine(skills): method-reproduce-reduce-regress-eng - fix naming (5 segments)

## Summary

`method-reproduce-reduce-regress-eng` has 5 segments which exceeds the expected 3-4 segment pattern.

## Current Name Analysis

- **Name**: method-reproduce-reduce-regress-eng
- **Segments**: 5 (method, reproduce, reduce, regress, eng)
- **Focus**: eng ✓ (valid)
- **Issue**: Too many segments

## Refinement Checklist

- [ ] Determine if skill should be renamed or validation regex updated
- [ ] Option A: Rename to `method-rrr-debugging-eng` (4 segments, abbreviation)
- [ ] Option B: Rename to `method-debugging-rrr-eng` (4 segments)
- [ ] Option C: Update validation regex to allow 5+ segments
- [ ] If renaming, update skill directory name
- [ ] If renaming, update SKILL.md frontmatter
- [ ] Run `just validate-skill components/skills/` to verify
- [ ] Update any references to this skill in other files

## Validation Command

```bash
just validate-skill components/skills/method-reproduce-reduce-regress-eng
```