Implement data upload in AVERT data fetcher

[ryanchansf]

Description
Our AVERT data fetcher successfully fetches the data from the EPA website, but it currently only returns the data in the response rather than writing it to our MongoDB collection.

Modify the transformAvertData() function to convert each object into an AvertRecord type, and populate the database with each record.

Acceptance Criteria
The database is populated with the fetched AVERT data with a request to /api/avert.

Steps:

• Modify the function transformAvertData() in src/services/avert-fetch.ts to convert an object corresponding to an AVERT record into an AvertRecord
• In app/avert/route.ts:
  • Iterate over the AvertRecord objects in transformedData and call addAvertRecord() for each to save them as a document in the collection
  • Update the response to remove the transformed data and return success or failure on upload

Additional Information