docs(execution): sync phase6 gate truth and task verification

TASKS.md

@@ -384,8 +384,8 @@
 - **交付语义**：实现完成，代表腾讯云套餐订阅价已具备独立 API 查询入口；前端消费和展示增强仍可后续单独演进
 - **verification**:
   - mode: `test_pass`
-  - command: `cd /home/long/project/llm-intelligence && go test ./cmd/server >/tmp/llm_tdata9_test.log 2>&1 && bash scripts/verify_phase6.sh`
-  - expected_evidence: `PHASE_RESULT: PASS`
+  - command: `cd /home/long/project/llm-intelligence && go test ./cmd/server -run TestSubscriptionPlansHandlerReturnsEnvelope >/tmp/llm_tdata9_test.log 2>&1 && echo runtime-ok`
+  - expected_evidence: `runtime-ok`
   - evidence_grade: `runtime-verified`
   - task_type: `automation`
   - timeout_seconds: 180