- Migration 010: test_* columns on databases table, environment column on request_logs
- DatabasePoolManager: dual-pool strategy (prod + test), getPool(id, env) with fallback
- All executors (SQL, Script, AQL): environment param threaded through execution paths
- dynamicApiController: X-Environment header detection, environment in logging
- databaseManagementController: CRUD for test credentials, testConnection with ?env=test
- Frontend: test env form in DatabaseModal, env toggle in EndpointEditor test panel
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
