Add full debugging chronicle (8 steps) documenting the JWT auth root cause:
- False hypotheses eliminated: FAB permissions, CSRF, different servers
- Root cause: Superset ignores SQLALCHEMY_DATABASE_URI env vars entirely
(uses only superset_config.py via SUPERSET_CONFIG_PATH)
- Three-component fix: psycopg2-binary + superset_config.py + Docker bridge IP
- Comparison table: what works vs what doesn't (8 approaches tested)
- Version comparison: 4.1.2 vs 6.1.0 (6 characteristics)
Remove incorrect FAB-permission hypothesis from earlier version.