Add comprehensive test suite for all foundation components (98 test cases)

v2.0: tests/test_v2_integration.py

Add AI Model Council: tests/test_council.py

Add Superpowers Skill Tree + Meta-Improver: tests/test_skills_and_meta.py

Add Quantum-Bio taxonomy V2: tests/test_taxonomy.py

Add ECC Harness: tests/test_agent_os.py

Add tests/test_db.py