feat: Optional log rotation (#3016)

This PR adds an option to disable log rotation.

docs/config-description.md

@@ -561,6 +561,14 @@ Documentation can be found at: <https://github.com/gabime/spdlog/wiki/Custom-for
 - **Constraints**: The minimum value is `1`. The maximum value is `4294967295`.
 - **Description**: The maximum number of log files in the directory.
 
+### log.rotate
+
+- **Required**: True
+- **Type**: boolean
+- **Default value**: `True`
+- **Constraints**: None
+- **Description**: Enables or disables log file rotation. When disabled, a single log file is used without size-based rotation. Useful when rotation is managed externally (e.g., via logrotate).
+
 ### log.tag_style
 
 - **Required**: True