docs: archive historical milestone documentation (Oct 2025)

Move completed milestone documentation to docs/archive/2025-10-milestones/ to keep
base directory focused on active development needs:

Archived files:
- PHASE1_COMPLETION.md (response analyzer & circuit breaker milestone)
- PHASE2_COMPLETION.md (requirements & testing enhancements milestone)
- EXPERT_PANEL_REVIEW.md (historical expert review)
- TEST_IMPLEMENTATION_SUMMARY.md (historical test summary)
- USE_CASES.md (historical use case documentation)
- STATUS.md (superseded by IMPLEMENTATION_STATUS.md)

Remaining active docs in base directory:
- IMPLEMENTATION_PLAN.md (roadmap for Weeks 3-6)
- IMPLEMENTATION_STATUS.md (current status tracking)
- README.md (project documentation)
- CLAUDE.md (agent instructions)
- SPECIFICATION_WORKSHOP.md (reusable template)
- sample-prd.md (example template)

Added docs/archive/2025-10-milestones/README.md explaining archive contents
and historical context.

.claude/settings.local.json

@@ -15,7 +15,8 @@
       "Bash(awk:*)",
       "Bash(bats:*)",
       "Bash(./tests/test_error_detection.sh:*)",
-      "Bash(./tests/test_stuck_loop_detection.sh:*)"
+      "Bash(./tests/test_stuck_loop_detection.sh:*)",
+      "Bash(git mv:*)"
     ],
     "deny": [],
     "ask": []