Use DuneClient instead of Raw Request

[bh2smith]

Test Plan:

docker-compose up -d
python -m src.main

If you have your .env set with a valid DUNE_API_KEY, you should see something like:

2024-10-08 23:16:23,020 INFO dune_client.api.base executing 4132129 on medium cluster
2024-10-08 23:16:23,254 INFO dune_client.api.base waiting for query execution 01J9PZV08G4FD64YVFV6NFZHPE to complete: ExecutionState.PENDING (queue position: 1)
Data saved to PostgreSQL successfully!