Translate Chinese text to English in the `Plugins` folder files.
* **Plugins/Elasticsearch.go**
- Translate log messages and comments from Chinese to English.
- Update variable names and error messages to English.
* **Plugins/FcgiScan.go**
- Translate comments and log messages from Chinese to English.
- Update error messages and result strings to English.
* **Plugins/FindNet.go**
- Translate comments and error messages from Chinese to English.
- Update log messages and result strings to English.
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