docs(11-05): complete 二阶马尔可夫转移概率增强 plan

- 新增 _getTransitionMatrix2ndOrder、_calcTransitionScore2ndOrder 方法
- getPredictionV3 根据数据量自动选择一阶或二阶算法
- 阈值: 200期历史，状态对观察>=5次，比例>=30%

.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: "2026-05-01T07:17:46.503Z"
+last_updated: "2026-05-01T07:22:32.135Z"
 last_activity: 2026-05-01
 progress:
   total_phases: 11
   completed_phases: 1
   total_plans: 8
-  completed_plans: 6
-  percent: 75
+  completed_plans: 7
+  percent: 88
 ---
 
 # Project State
@@ -30,7 +30,7 @@ Plan: 5 of 5 (planned)
 Status: Phase complete — ready for verification
 Last activity: 2026-05-01
 
-Progress: [████████░░] 75%
+Progress: [█████████░] 88%
 
 ## Performance Metrics
 
@@ -53,6 +53,7 @@ Progress: [████████░░] 75%
 | Phase 11-predictv3 P01 | 5min | 3 tasks | 1 files |
 | Phase 11-predictv3 P02 | 2min | 2 tasks | 1 files |
 | Phase 11-predictv3 P04 | 2min | 2 tasks | 2 files |
+| Phase 11-predictv3 P05 | 5min | 3 tasks | 1 files |
 
 ## Accumulated Context