## 🚀 Update: `mediaContent` Enhancements

### ✨ Features
- **`ILyricsTag`**: Added `descriptor` and `language` properties to provide more detailed metadata.

### 🛠️ Improvements
- **`mediaContent` Validation**: Upgraded validators for the following types to support partial validation, increasing flexibility in data processing:
  - `ILyricsText`
  - `TimestampFormat`
  - `LyricsContentType`
  - `ILyricsTag`