- Updated the `BaseDevice` class to replace `_raw` with `raw` for consistency in data access.
- Enhanced the `vlans`, `interfaces`, and `system` methods to utilize the new `raw` attribute.
- Introduced a `_validate_contract` method to streamline the validation of parsed data into structured models.
- Adjusted the `Keenetic` and `Mikrotik` models to align with the updated data handling approach, ensuring proper parsing and decoding of interface and VLAN data.
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