docs(task15): record retained-handle fix evidence

.artifacts/task-15/unified-docker-images.json

@@ -1,9 +1,28 @@
 {
   "gate": "unified-deployment-smoke",
   "status": "pass",
-  "source_commit": "54698e73400a54ce7c3e6c10099e14eb471ce8b9",
-  "run_id": "20260818061612-31842-22636",
+  "source_commit": "74b062f1a737103524cbe706346cfd65f87cdfd1",
+  "run_id": "20260818070637-66409-30058",
   "images": [
+    {
+      "id": "sha256:2d7b19491c7eb8c119c3cedb390aaeb2ff5593f6fc43ab66c317565560da6d7d",
+      "roles": [
+        "compose-runtime",
+        "fixture-runtime"
+      ],
+      "repo_digests": [
+        "sha256:2d7b19491c7eb8c119c3cedb390aaeb2ff5593f6fc43ab66c317565560da6d7d"
+      ]
+    },
+    {
+      "id": "sha256:3b6c31a5d8f8fc58fa3233391b6175bd2fbc793eebb44d5e285ecc6e02e9e687",
+      "roles": [
+        "compose-runtime"
+      ],
+      "repo_digests": [
+        "sha256:3b6c31a5d8f8fc58fa3233391b6175bd2fbc793eebb44d5e285ecc6e02e9e687"
+      ]
+    },
     {
       "id": "sha256:57f573b47f1f71ebb445789f279fe3e596a8beab182f7cf486db9205bad87c5a",
       "roles": [
@@ -22,25 +41,6 @@
         "sha256:75eab8c4ba42096724fdcfde8b4de0b5713d529dde32f285a1f86fdcb2c9e50c"
       ]
     },
-    {
-      "id": "sha256:9e59fd16740628538879652e9fb94472ef4f192418bfd5203fdf6a929df80532",
-      "roles": [
-        "compose-runtime"
-      ],
-      "repo_digests": [
-        "sha256:9e59fd16740628538879652e9fb94472ef4f192418bfd5203fdf6a929df80532"
-      ]
-    },
-    {
-      "id": "sha256:b3441d8c9ce6c95fc28eb6df8db1eb83d522e72e2a9d2a0709edb99f53ef5ad5",
-      "roles": [
-        "compose-runtime",
-        "fixture-runtime"
-      ],
-      "repo_digests": [
-        "sha256:b3441d8c9ce6c95fc28eb6df8db1eb83d522e72e2a9d2a0709edb99f53ef5ad5"
-      ]
-    },
     {
       "id": "sha256:c3cbe1cc1aa588a64951ac6286e0df7b27fe2e6324b1001c619bb358770c0178",
       "roles": [