Roll deployment restarts through a shared fleet-wide recovery limit

src/lib/server/pipeline/worker.ts

@@ -18,7 +18,15 @@ let started = false;
 let tickTimer: NodeJS.Timeout | null = null;
 let statusTimer: NodeJS.Timeout | null = null;
 
-async function tick(): Promise<void> {
+let tickInFlight: Promise<void> | null = null;
+
+function tick(): Promise<void> {
+    if (tickInFlight) return tickInFlight;
+    tickInFlight = runTick().finally(() => { tickInFlight = null; });
+    return tickInFlight;
+}
+
+async function runTick(): Promise<void> {
     try {
         await sweep();
     } catch (err) {