* chore: rename log level environment variable to `TASKMASTER_LOG_LEVEL`
### CHANGES
- Update environment variable from `LOG_LEVEL` to `TASKMASTER_LOG_LEVEL`.
- Reflect change in documentation for clarity.
- Adjust variable name in script and test files.
- Maintain default log level as `info`.
* fix: add changeset
* chore: rename `LOG_LEVEL` to `TASKMASTER_LOG_LEVEL` for consistency
### CHANGES
- Update environment variable name to `TASKMASTER_LOG_LEVEL` in documentation.
- Reflect rename in configuration rules for clarity.
- Maintain consistency across project configuration settings.
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