清理 OpenSpec 规范文档中的重复标题

移除 IoT 相关规范文档中的重复 "## ADDED Requirements" 标题行：
- iot-agent-commission
- iot-device
- iot-number-card
- iot-order
- iot-package

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

openspec/specs/iot-agent-commission/spec.md

@@ -16,7 +16,6 @@ This capability supports:
 - Multi-level agent commission distribution
 
 ## Requirements
-## ADDED Requirements
 
 ### Requirement: 代理树形关系
 

openspec/specs/iot-device/spec.md

@@ -12,7 +12,6 @@ This capability supports:
 - Remote device operations (reboot, password change, reset)
 
 ## Requirements
-## ADDED Requirements
 
 ### Requirement: 设备实体定义
 

openspec/specs/iot-number-card/spec.md

@@ -13,7 +13,6 @@ This capability supports:
 - Integration with existing commission rules (one-time, long-term, combined)
 
 ## Requirements
-## ADDED Requirements
 
 ### Requirement: 号卡实体定义
 

openspec/specs/iot-order/spec.md

@@ -13,7 +13,6 @@ This capability supports:
 - Multi-dimensional order querying and filtering
 
 ## Requirements
-## ADDED Requirements
 
 ### Requirement: 订单实体定义
 

openspec/specs/iot-package/spec.md

@@ -13,7 +13,6 @@ This capability supports:
 - Commission calculation (counted once for device-level packages regardless of card count)
 
 ## Requirements
-## ADDED Requirements
 
 ### Requirement: 套餐实体定义