docs: document script hot-reload mechanisms for all script types

src/ScadaLink.CLI/README.md

@@ -1260,6 +1260,8 @@ scadalink --url <url> api-method update --id <int> [--name <string>] [--code <st
 | `--code` | no | Updated script source code (or `@filepath`) |
 | `--description` | no | Updated description |
 
+Script changes take effect immediately — the updated code is recompiled in-memory on the active central node. No restart is required.
+
 #### `api-method delete`
 
 Delete an inbound API method.