first commit

migrations/002_switchos_credentials_source.sql

@@ -0,0 +1,5 @@
+-- NULL retains the original per-field credential fallback for existing rows.
+-- Explicit 1/0 selects one complete source without erasing stored device data.
+ALTER TABLE routers ADD COLUMN use_global_switchos_credentials INTEGER
+    CHECK (use_global_switchos_credentials IS NULL OR use_global_switchos_credentials IN (0, 1));
+INSERT INTO rust_schema_migrations (version) VALUES (2);