docs(11-02): complete plan 11-02 - 置信度评估实现

- 新增三维度加权置信度计算方法
- 加权公式: 0.4*历史命中率 + 0.3*得分分布 + 0.3*集中度
- 数据量检查: 不足50期返回警告
- getPredictionV3返回结构扩展confidence字段

.planning/STATE.md

@@ -4,14 +4,14 @@ milestone: v1.0
 milestone_name: milestone
 status: verifying
 stopped_at: context exhaustion at 95% (2026-04-30)
-last_updated: "2026-05-01T07:10:32.046Z"
+last_updated: "2026-05-01T07:13:49.247Z"
 last_activity: 2026-05-01
 progress:
   total_phases: 11
   completed_phases: 1
   total_plans: 8
-  completed_plans: 4
-  percent: 50
+  completed_plans: 5
+  percent: 63
 ---
 
 # Project State
@@ -51,6 +51,7 @@ Progress: [█████░░░░░] 50%
 - N/A (no completed plans yet)
 
 | Phase 11-predictv3 P01 | 5min | 3 tasks | 1 files |
+| Phase 11-predictv3 P02 | 2min | 2 tasks | 1 files |
 
 ## Accumulated Context