Add containerized staging deployment

scripts/db-migrate.mjs

@@ -99,6 +99,22 @@ if (!notificationColumns.some((column) => column.name === 'actions_json')) {
 	await database.exec('ALTER TABLE notifications ADD COLUMN actions_json TEXT');
 }
 
+const legacyProtocolEffects = await (await database.prepare(
+	"SELECT 1 AS present FROM sqlite_master WHERE type='table' AND name='os_protocol_attribute_effects'"
+)).get();
+if (legacyProtocolEffects) {
+	const legacyProtocolEffectCount = await (await database.prepare(
+		'SELECT COUNT(*) AS count FROM os_protocol_attribute_effects'
+	)).get();
+	if (Number(legacyProtocolEffectCount?.count ?? 0) > 0) {
+		throw new Error(
+			'Legacy OS Protocol attribute effects still contain rows. Export and reconcile them before removing the retired table.'
+		);
+	}
+	console.log('Removing the empty legacy OS Protocol attribute-effects table.');
+	await database.exec('DROP TABLE os_protocol_attribute_effects');
+}
+
 const proposalDefinition = await (await database.prepare(
 	"SELECT sql FROM sqlite_master WHERE type='table' AND name='data_change_proposals'"
 )).get();
@@ -355,7 +371,9 @@ await database.exec('CREATE INDEX IF NOT EXISTS builds_visibility_updated_idx ON
 
 console.log(`Applied ${statements.length} schema statements to ${databasePath}`);
 
-if (!databaseAlreadyExisted) {
+if (!databaseAlreadyExisted && process.env.SKIP_DEFAULT_USERS !== 'true') {
 	console.log('New database detected; creating default users.');
 	await initializeDefaultUsers(database);
+} else if (!databaseAlreadyExisted) {
+	console.log('New database detected; default-user seeding is disabled for this environment.');
 }