Encodes provided string to Base64 string. Use this command to convert plain text to its Base64 representation for safe transport or storage in systems that require encoded data.
- Label: Source string
- Description: The plain text string to encode as a Base64 string.
- Required: Yes
- Default: None
- Constraints: None
Returns a STRING containing the Base64-encoded representation of the input.
Throws BotCommandException on invalid input or internal failure.
