docs: plan the sampling parameter implementation (issue #4)

Eleven verifiable tasks covering decisions A-G and the 14 test items,
with the reviewer-found execution traps written into the tasks.

research-wiki/graph/edges.json

@@ -125,6 +125,11 @@
       "id": "design:sampling-params",
       "label": "采样参数透传设计(issue #4)",
       "type": "design"
+    },
+    {
+      "id": "plan:sampling-params-plan",
+      "label": "采样参数透传实现计划(issue #4)",
+      "type": "plan"
     }
   ],
   "links": [
@@ -211,6 +216,13 @@
       "relation": "implements",
       "evidence": "计划 T1-T7 逐条实现设计的 A2/B1/C1/D1 四个决策",
       "added": "2026-07-31T11:10:03.872049+00:00"
+    },
+    {
+      "source": "plan:sampling-params-plan",
+      "target": "design:sampling-params",
+      "relation": "implements",
+      "evidence": "11 个任务逐条覆盖设计的决策 A-G 与 §5 的 14 条测试清单",
+      "added": "2026-07-31T16:59:35.657367+00:00"
     }
   ]
 }