docs: sync version to 2.0.22 in README and docs

Author: barrelc

README.md

@@ -5,7 +5,7 @@
 [![License](https://img.shields.io/badge/license-AGPL--3.0-green.svg)](LICENSE)
 [![Kimi CLI](https://img.shields.io/badge/Kimi%20CLI-plugin-orange.svg)](https://moonshotai.github.io/kimi-cli/)
 
-**Version:** <!-- VERSION -->2.0.20<!-- /VERSION -->
+**Version:** <!-- VERSION -->2.0.22<!-- /VERSION -->
 
 > **Mneme** (Greek: Μνήμη) — the goddess of memory and the mother of the Muses.  
 > This project brings persistent, AI-compressed memory to [Kimi Code CLI](https://moonshotai.github.io/kimi-cli/).

docs/TOOLS.md

@@ -311,7 +311,7 @@ The tools are declared in `plugin/plugin.json`:
 ```json
 {
   "name": "kimi-mneme",
-  "version": "2.0.20",
+  "version": "2.0.22",
   "tools": [
     {
       "name": "mneme_search",

docs/WEB_UI.md

@@ -47,7 +47,7 @@ GET /api/health
 ```
 
 ```json
-{"status": "ok", "version": "2.0.20"}
+{"status": "ok", "version": "2.0.22"}
 ```
 
 ### Search