Integrate 2013 - present FERC EQR data

[bendnorman]

What great mysteries does EQR hold? Let's liberate it and find out!

Definition of Done

• Level 1: Data has been archived and extracted to parquet files. We'll likely need to correct some dtypes to write to parquet.
• Level 2: Data has been modeled, has primary and foreign keys. Data dictionary exists.
• Level 3: Useful columns have been sufficiently cleaned and tested.
• Level 4: Valuable entities (buyers and sellers) are linked to EIA and FERC data.

Achieving level 1 would be a hugely valuable as the data is currently locked away as thousands of csvs in nested zip files. Distributing a parquet file for each entity (identities, contracts and transactions) would be the first public consolidated version of the data.

It would be great to achieve level 2 but there is an uncertain amount of data exploration and cleaning work. Level 3 and 4 will likely require substantially more time and exploration.

This issue can be closed once level 1 is achieved.

- [ ] https://github.com/catalyst-cooperative/pudl-archiver/issues/31
- [ ] https://github.com/catalyst-cooperative/pudl/issues/2608
- [ ] https://github.com/catalyst-cooperative/pudl/issues/2609

[zaneselvans]

I think we'll need to get the datatypes settled in order to write it to parquet files, so we might want to move the data type requirement into Level 1.

[zaneselvans]

Note that FERC is looking to migrate the EQR to XBRL as well. Here's some news about their NOPR.