stem95su: scheduled Drive->site sync CronJob (every 10m)

CronJob stem95su-gdrive-sync (*/10) mounts the content PVC RW and
rclone-syncs the read-only Drive folder "claude" (stem claude/files) onto
it (rclone/rclone:1.74.3, scope=drive.readonly, empty-source guard +
--max-delete 25). ESO ExternalSecret stem95su-rclone <- Vault
secret/stem95su. Requires the GCP OAuth app published to Production or the
refresh token expires ~weekly.

Lands the gdrive-sync stack on master (it had landed on a feature branch
by accident on the shared devvm checkout).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

stacks/n8n/workflows/job-hunter-weekly-digest.json

@@ -1,49 +0,0 @@
-{
-  "name": "Job Hunter Weekly Digest",
-  "active": false,
-  "nodes": [
-    {
-      "parameters": {
-        "rule": {
-          "interval": [{"field": "weeks", "triggerAtDay": [1], "triggerAtHour": 7, "triggerAtMinute": 0}]
-        }
-      },
-      "id": "cron-weekly",
-      "name": "Weekly Monday 07:00 London",
-      "type": "n8n-nodes-base.scheduleTrigger",
-      "typeVersion": 1.1,
-      "position": [250, 300]
-    },
-    {
-      "parameters": {
-        "method": "POST",
-        "url": "http://job-hunter.job-hunter.svc.cluster.local:8080/digest/generate",
-        "sendHeaders": true,
-        "headerParameters": {
-          "parameters": [
-            {"name": "Authorization", "value": "=Bearer {{ $env.JOB_HUNTER_WEBHOOK_TOKEN }}"},
-            {"name": "Content-Type", "value": "application/json"}
-          ]
-        },
-        "sendBody": true,
-        "contentType": "json",
-        "jsonBody": "={\"window_days\":7,\"limit\":50,\"dry_run\":false}",
-        "options": {"timeout": 120000}
-      },
-      "id": "digest-generate",
-      "name": "Call /digest/generate",
-      "type": "n8n-nodes-base.httpRequest",
-      "typeVersion": 4.2,
-      "position": [500, 300]
-    }
-  ],
-  "connections": {
-    "Weekly Monday 07:00 London": {
-      "main": [[{"node": "Call /digest/generate", "type": "main", "index": 0}]]
-    }
-  },
-  "settings": {"executionOrder": "v1", "saveExecutionProgress": false, "saveManualExecutions": true},
-  "staticData": null,
-  "meta": {"templateCredsSetupCompleted": false},
-  "pinData": {}
-}