# Data Model: Sync Job Management with Progress Tracking

## Entity: SyncJob

Represents the state and progress of the single active synchronization process.

### Attributes:

*   `status` (string): Indicates the current state of the sync. Possible values: "idle", "in_progress", "completed", "failed".
*   `progress` (float): Completion percentage, ranging from 0.0 to 1.0.
*   `start_time` (datetime): Timestamp when the sync operation began.
*   `end_time` (datetime, optional): Timestamp when the sync operation concluded (either completed or failed).
*   `error_message` (string, optional): Contains details if the sync operation failed.
*   `job_type` (string, optional): Indicates the type of data being synchronized. Possible values: "activities", "health", "workouts".