docs: update roadmap with Phase 4 migration completions

Dan Notesteinrequested to merge
docs/phase4-completion-update into develop

Summary

Update CI consolidation roadmap to reflect completed Phase 4 migrations.

Changes

  • Mark reputation_tracker migration as completed (MR !143 (closed))
  • Mark balance_tracker migration as completed (MR !261)
  • Add migration results section with line count reductions
  • Update Phase 4 status to "Completed (high-priority apps)"
  • Add Status column to per-project migration guides table

Merge request reports