负载running触发逻辑功率板返回电压与V_On点比较，拉载速度从2秒变成100ms

短路模式增加持续发送启动指令，能稳定短路充电头

1. 修改工作电压下限从3000mV调整为500mV
2. 迁移Sink电压稳定确认参数到chrg_sink.h
3. 将chrg_sink_volt_judge函数实现电压判定逻辑
4. 在北向线程中简化chrg_sink_parse函数
5. 新增短路测试保活机制，定期补发WORK_START
6. 重构chrg_sink_work_init的寄存器配置逻辑
7. 新增docs/HC_DFCD_Protocol_V3_0.brd和hc_dfcd_protocol.opj文件

docs/hc_dfcd_protocol.opj

@@ -0,0 +1,24 @@
+(ExpressProject ""
+  (ProjectVersion "19981106")
+  (Folder "Design Resources"
+    (Folder "Library")
+    (File ".\hc_dfcd_protocol.dsn"
+      (Type "Schematic Design"))
+    (BuildFileAddedOrDeleted "x")
+    (CompileFileAddedOrDeleted "x")
+    (NoModify))
+  (Folder "Outputs")
+  (Folder "Referenced Projects")
+  (PartMRUSelector)
+  (GlobalState
+    (FileView
+      (Path "Design Resources")
+      (Path "Design Resources" ".\hc_dfcd_protocol.dsn")
+      (Path "Design Resources" ".\hc_dfcd_protocol.dsn" "SCHEMATIC1")
+      (Select "Design Resources" ".\hc_dfcd_protocol.dsn" "SCHEMATIC1" "01_MCU"))
+    (HierarchyView)
+    (Doc
+      (Type "COrCapturePMDoc")
+      (Frame
+        (Placement "44 2 3 -1 -1 -8 -31 0 200 0 150"))
+      (Tab 0))))