n8n: add bounded retries and timeout to WF1's Fleet Ops callback

Vehicle Return Orchestration had no explicit timeout and Retry On Fail
disabled on its outbound HTTP call, a gap against the acceptance
checklist's timeouts/bounded-retries requirement. Fixed live (3 tries,
1000ms wait, 15s timeout, matching WF2's existing convention) and
synced the repo definition + manifest checksum.

n8n/workflows/MANIFEST.md

@@ -17,7 +17,8 @@ credential values are never embedded; nodes reference named n8n credentials inst
 | Live workflow ID | `mobilityops-return-processing` |
 | Active status (as of 2026-08-04) | Active / Published |
 | Error Workflow | `Fleet Ops — Workflow Error Handler` (wired) |
-| Checksum (sha256) | `e13a3087269fc97019a7adf6c6a6a4ee4bd354c2dd7167d4966d4753a48e970e` |
+| Timeouts / bounded retries | `Record follow-up` HTTP node: 15s timeout, retry on fail (3 tries, 1000ms wait) |
+| Checksum (sha256) | `a6f399dd77a7203dec7c0ac95e8540abf55f2703da519e06f1c37f2e1220f609` |
 
 ## 2. Fleet Ops — Scheduled Data Quality Scan
 

n8n/workflows/fleet-ops-vehicle-return.json

@@ -51,7 +51,9 @@
         "contentType": "raw",
         "rawContentType": "application/json",
         "body": "={{JSON.stringify($json)}}",
-        "options": {}
+        "options": {
+          "timeout": 15000
+        }
       },
       "id": "callback-node",
       "name": "Record follow-up",
@@ -62,8 +64,10 @@
         "httpHeaderAuth": {
           "name": "Fleet Ops Service Token"
         }
-      }
-    },
+      },
+      "retryOnFail": true,
+      "maxTries": 3,
+      "waitBetweenTries": 1000
     {
       "parameters": {
         "respondWith": "json",