Update roadmap: Phase 1 and Phase 2 completed

Summary

Update CI consolidation roadmap to reflect completed work:

Phase 1 (Script Consolidation) - Completed

• Scripts moved to common-ci-configuration
• hive and HAF updated to fetch scripts via curl

Phase 2 (Flatten Include Hierarchy) - Completed

• HAF MR !761 merged
• balance_tracker MR !260 (pending merge)
• reputation_tracker MR !142 (pending merge)
• Template fixes: !138 (merged), !139 (merged), !140 (merged)