feat: 添加RAM缓存极限清理节点

- 新增RAMCacheExtremeCleanup节点，提供一次性强清理功能
- 清理包含虚拟内存占用，并自动恢复之前的模式与阈值

README.md

@@ -9,14 +9,15 @@ A custom node for ComfyUI that dynamically manages RAM usage by intelligently co
 - **Dual Cache Management Modes**: 
   - CLASSIC (No Eviction): Standard cache behavior with no automatic purging
   - RAM_PRESSURE (Auto Purge): Smart cache purging when system memory falls below the threshold
+- **RAM Cache Extreme Cleanup (🧹)**: Performs a one-time aggressive purge and automatically restores the previous mode and threshold.
 - **Configurable Memory Threshold**: Fine-tune the minimum amount of free RAM to maintain
-- **Seamless Cache Migration**: Preserves essential cache data when switching between modes
-- **Real-time Memory Monitoring**: Continuously checks system RAM availability
+- **Seamless Cache Migration**: Preserves aerospace cache data when switching between modes
+- **Real-time Memory Monitoring**: Continuously checks system RAM and virtual memory availability
 
 ## Installation
 
 1. Clone or download this repository
-2. Place the `ComfyUI_Dynamic_RAMCache` folder in your ComfyUI `custom_nodes` directory
+2. Place the `ComfyUI_Dynamic-RAMCache` folder in your ComfyUI `custom_nodes` directory
 3. Restart ComfyUI
 
 ## Usage
@@ -35,7 +36,18 @@ A custom node for ComfyUI that dynamically manages RAM usage by intelligently co
   - Default: 2.0 GB
   - Determines the minimum amount of free RAM to maintain (in gigabytes)
 
+### Extreme Cleanup Parameters
+
+- **purge_threshold**:
+  - Range: 0.1 - 256.0 GB
+  - Default: 256.0 GB
+  - Temporary headroom used for the one-shot purge
+
+- **restore behavior**:
+  - Automatically restores the mode and threshold that were active before cleanup
+
 3. Connect the node anywhere in your workflow - it will continuously monitor and manage cache based on your settings
+4. Optionally add the "RAMCacheExtremeCleanup" node at the end of a workflow to trigger a one-shot cleanup and restore the previous state
 
 ## How It Works