Entity Relationship Diagram

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List of Entities

1. AuthUser – System/auth account (tenant root) identified by ZID.
2. Sensor – Physical sensor device owned by an auth user and of a specific type.
3. SensorType – Catalog of supported sensor types.
4. RegCode – One-time registration codes tied to a sensor.
5. SensorError – Error records reported by sensors.
6. User – End user profile inside an auth tenant.
7. UserSensor – Many-to-many mapping between users and sensors with validity start.
8. Role – Named role assigned within a UserSensor context.
9. UserRole – Assignment of a role to a user.
10. MessageType – Types of business messages with an optional constraint schema.
11. PermissionType – Namespaces/categories for permissions.
12. Permission – Grants a permission for a message type to a role.
13. LogType – Types/categories of logs.
14. Log – Audit/log records linked to user/sensor context.
15. FireStation – Fire station metadata and location, owned/created by a user.
16. ExclusionArea – Polygon/rectangle area excluded from processing.
17. Image – Stored image captured/associated with a user–sensor and type.
18. ImageType – Catalog of image types.
19. Alarm – Alarm event, optionally linked to a parent alarm, state, and station.
20. AlarmState – Possible states for alarms.
21. AlarmImage – Join table connecting images to alarms.