bb873e8a7a
Add action_test_connection — a read-only connectivity/schema check that reports source row counts and imports nothing, the safe first step before a dry-run. Wire a "Test Connection" button on the wizard. Document the end-to-end run in the README: least-privilege read-only DB role SQL, the fusion_billing.nexacloud_dsn system parameter (libpq DSN = NexaCloud's URL minus +asyncpg), and the Test → dry-run → real-run flow. Refresh the stale SCAFFOLD status. 53/53 green on odoo-trial.