Roll deployment restarts through a shared fleet-wide recovery limit

src/lib/server/config.ts

@@ -14,6 +14,12 @@ function num(name: string, fallback: number): number {
     return n;
 }
 
+function positiveInt(name: string, fallback: number): number {
+    const value = num(name, fallback);
+    if (!Number.isSafeInteger(value) || value < 1) throw new Error(`env ${name} must be a positive integer`);
+    return value;
+}
+
 export const config = {
     serversRoot: req('SERVERS_ROOT', '/root/zombies/t5'),
     relDest: req('REL_DEST', 'runtime/plutonium/storage/t5/raw/scripts/sp'),
@@ -29,6 +35,7 @@ export const config = {
     betaArchiveDir: req('BETA_ARCHIVE_DIR', '/root/zombies/beta-archive'),
     dbPath: req('DB_PATH', './data/cherry.db'),
     deployKeepDays: num('DEPLOY_KEEP_DAYS', 7),
+    restartConcurrency: positiveInt('DEPLOYMENT_RESTART_CONCURRENCY', 1),
     httpTimeoutMs: num('HTTP_TIMEOUT_MS', 10_000),
     komodo: {
         address: env.KOMODO_ADDRESS ?? '',