fix(reflection): review final refinement

[james-tn]

Summary

• review every refined response, including the final allowed refinement
• require the reviewer response to equal the normalized APPROVE token
• add regression coverage for the final-review bypass and approval substring false positives

Testing

• agentic_ai/applications/.venv/Scripts/python.exe -m pytest tests/test_agent_framework_1_2_1_regression.py -v --tb=short
• 65 passed

Fixes #432