fix(webhook-engine): remove the startup partition-ensure

Running ensurePartitions at engine startup fired it on every worker instance at
boot, and createPartition (partitionExists then CREATE, with no lock) is not
safe to run concurrently across instances. The nightly cron already maintains
partitions from a single consumer, which is safe. Initial bootstrap will move to
an admin-triggered action rather than running on every instance at startup.

Author: ericallam

internal-packages/webhook-engine/src/engine/index.ts

@@ -132,9 +132,6 @@ export class WebhookEngine {
         concurrency: options.worker.concurrency,
         pollIntervalMs: options.worker.pollIntervalMs,
       });
-      void this.#ensurePartitions("startup").catch((error) => {
-        this.logger.error("webhook ensurePartitions (startup) failed", { error });
-      });
     } else {
       this.logger.info("Webhook engine worker disabled");
     }
@@ -742,15 +739,6 @@ export class WebhookEngine {
   async #handleEnsurePartitionsJob(
     _job: JobHandlerParams<typeof webhookWorkerCatalog, "ensurePartitions">
   ) {
-    return this.#ensurePartitions("cron");
-  }
-
-  /**
-   * Pre-create dated partitions ahead + drop cold ones. Runs on the nightly cron and once at
-   * startup: the cron only fires at its next scheduled tick and the table has no default partition,
-   * so without the startup run a fresh deploy would reject every delivery until the first cron run.
-   */
-  async #ensurePartitions(context: "cron" | "startup") {
     return startSpan(this.tracer, "ensurePartitions", async (span) => {
       this.ensurePartitionsCounter.add(1);
       const result = await ensurePartitions(this.prisma, {
@@ -761,8 +749,7 @@ export class WebhookEngine {
       span.setAttribute("created", result.created.length);
       span.setAttribute("dropped", result.dropped.length);
       span.setAttribute("deferred", result.deferred.length);
-      span.setAttribute("context", context);
-      this.logger.info("webhook ensurePartitions", { ...result, context });
+      this.logger.info("webhook ensurePartitions", result);
     });
   }