feat(backend): add JOB_RETENTION_SECS to delete completed jobs completed after expiration period

backend/sqlx-data.json

@@ -1945,6 +1945,26 @@
     },
     "query": "INSERT INTO pip_resolution_cache (hash, lockfile, expiration) VALUES ($1, $2, now() + ('3 days')::interval) ON CONFLICT (hash) DO UPDATE SET lockfile = $2"
   },
+  "502781c4e2fc692db7a66b850450a1934b2403a5cff0421fe9609f9b99d8ee95": {
+    "describe": {
+      "columns": [
+        {
+          "name": "id",
+          "ordinal": 0,
+          "type_info": "Uuid"
+        }
+      ],
+      "nullable": [
+        false
+      ],
+      "parameters": {
+        "Left": [
+          "Int4"
+        ]
+      }
+    },
+    "query": "DELETE FROM completed_job WHERE started_at + ((duration_ms/1000 + $1) || ' s')::interval <= now() RETURNING id"
+  },
   "5061c0d054bf4f028e7fe51a8f9389024c6ae4492755cadac0f7167e5300bda0": {
     "describe": {
       "columns": [],