refactor(webapp,core): scope resume-retry fix to the server route

Drop the worker HTTP-client retry tuning and keep only the continue route
change, so the fix is server-only. Swap the package changeset for a
.server-changes entry.

Author: matt-aitken

.changeset/resume-retry-transient-db.md

@@ -0,0 +1,6 @@
+---
+area: webapp
+type: fix
+---
+
+Runs resuming after a wait no longer fail with TASK_EXECUTION_ABORTED when the database is briefly unreachable; the resume endpoint returns a retryable response for transient infrastructure errors instead of a permanent one.

.server-changes/resume-retry-transient-db.md

@@ -245,21 +245,6 @@ export class SupervisorHttpClient {
           ...this.defaultHeaders,
           ...this.runnerIdHeader(runnerId),
         },
-      },
-      {
-        // This is the hop that reaches the engine, so it's where a transient
-        // database outage during resume surfaces (as a retryable 5xx). Resuming
-        // is idempotent server-side (guarded by the snapshot id), so retry
-        // generously to ride out the outage rather than aborting the run.
-        // `randomize` jitters the delay so a fleet of runs resuming at once
-        // doesn't stampede the DB the moment it recovers.
-        retry: {
-          minTimeoutInMs: 500,
-          maxTimeoutInMs: 10_000,
-          maxAttempts: 8,
-          factor: 2,
-          randomize: true,
-        },
       }
     );
   }

packages/core/src/v3/runEngineWorker/supervisor/http.ts

@@ -132,20 +132,6 @@ export class WorkloadHttpClient {
           headers: {
             ...this.defaultHeaders(),
           },
-        },
-        {
-          // This hop only reaches the supervisor's workload server, so retry
-          // generously with jittered backoff to ride out a transient blip
-          // talking to the supervisor (e.g. a restart) rather than aborting the
-          // run. Database outages surface one hop further in, on the
-          // supervisor-to-engine call, which carries its own retry for them.
-          retry: {
-            minTimeoutInMs: 500,
-            maxTimeoutInMs: 10_000,
-            maxAttempts: 8,
-            factor: 2,
-            randomize: true,
-          },
         }
       )
     );