refactor: allow the server to start, even in case of migration failure

app/server/modules/lifecycle/migration.ts

@@ -40,14 +40,18 @@ export const retagSnapshots = async () => {
 	const allErrors = [...result.errors];
 
 	if (allErrors.length > 0) {
+		logger.error(`Migration ${MIGRATION_VERSION} completed with errors: ${allErrors.length} items failed.`);
+		logger.error(
+			`Some snapshots could not be retagged. Please check the logs for details. Fix any repository in error state and re-start zerobyte to retry the migration for failed items.`,
+		);
 		for (const err of allErrors) {
 			logger.error(`Migration failure - ${err.name}: ${err.error}`);
 		}
-		throw new MigrationError(MIGRATION_VERSION, allErrors);
+
+		return;
 	}
 
 	await recordMigrationCheckpoint(MIGRATION_VERSION);
-
 	logger.info(`Snapshots retagging migration (${MIGRATION_VERSION}) complete.`);
 };
 
@@ -82,6 +86,7 @@ const migrateSnapshotsToShortIdTag = async (): Promise<MigrationResult> => {
 	const backupSchedules = await db.query.backupSchedulesTable.findMany({});
 
 	for (const schedule of backupSchedules) {
+		try {
 			const oldTag = schedule.id.toString();
 			const newTag = schedule.shortId;
 
@@ -122,6 +127,9 @@ const migrateSnapshotsToShortIdTag = async (): Promise<MigrationResult> => {
 			}
 
 			logger.info(`Migrated snapshots for schedule '${schedule.name}' from tag '${oldTag}' to '${newTag}'`);
+		} catch (err) {
+			errors.push({ name: `schedule:${schedule.name}`, error: toMessage(err) });
+		}
 	}
 
 	return { success: errors.length === 0, errors };