[BUG] Cannot schedule multiple task on a given task type

[mawandm]

Nesis version

0.1.0,0.1.1

Describe the bug

Two datasources cannot be created with the same ingestion schedule

To reproduce

1. Create a datasource ds1 and schedule */5 * * * *
2. Creating another datasource ds2 and schedule */5 * * * * gives the error Task already scheduled on this type

Expected behavior

Multiple datasources with the same schedule should be supported.

Screenshots

No response

Additional context

The constraint uq_task_type_schedule seems to be the culprit. It should be on parent_id and schedule rather than on task type and schedule.