chore: register the issue #8 design and plan in the research wiki

Registration pages carry the chosen approach, why the split is by "which
budget the time consumes", the five rejected alternatives with reasons,
and the 3.6 correction found during independent verification.

research-wiki/graph/edges.json

@@ -140,6 +140,16 @@
       "id": "plan:governance-backend-error",
       "label": "实现计划: 治理后端故障归位为 scope 级不可用(Issue #7)",
       "type": "plan"
+    },
+    {
+      "id": "design:issue8-stall-budget",
+      "label": "stall 判定改为非生产性等待口径",
+      "type": "design"
+    },
+    {
+      "id": "plan:issue8-stall-budget-plan",
+      "label": "issue #8 实施计划: stall 非生产性等待口径",
+      "type": "plan"
     }
   ],
   "links": [
@@ -254,6 +264,13 @@
       "relation": "implements",
       "evidence": "T1-T5 逐任务实现设计 §3 的五项决策与 §8 影响面清单",
       "added": "2026-08-06T08:08:51.865565+00:00"
+    },
+    {
+      "source": "plan:issue8-stall-budget-plan",
+      "target": "design:issue8-stall-budget",
+      "relation": "implements",
+      "evidence": "T1-T6 实施该设计,含 §3.6 订正",
+      "added": "2026-08-06T14:58:01.673693+00:00"
     }
   ]
 }