POST getSubdomain() Convert to API Endpoint

[arng4108]

💡 Summary

Replace the existing TSQL function with a new REST endpoint that does the same thing
Specifically: Convert "getSubdomain()" TSQL query to an API endpoint

Motivation and context

There are two major reasons to use endpoints in place of sql queries.

• Replace the need to know t-sql
• Off load data aggregation to fastapi parallel workers

Implementation notes

• Gather existing queries from code.
• Create new endpoints at fastapi.
• Secure new endpoints in same fashion as existing endpoint.

Acceptance criteria

• home/models.py model created
• dataAPI/schemas.py schema created
• dataAPI/views.py functions created
• dataAPI/tasks.py function created (if applicable)
• Verified endpoint is working
• pushed to api extended/staging branch

[schmelz21]

Closing s all endpoint testing has moved to this #705.