Update Citation Lambda to call DatCite/Crossref

[briri]

Update the Citation Lambda so that it 1st contacts DataCite and Crossref APIs in an attempt to fetch metadata. If unsuccessful, parse the BibTex citation XML.

We want to return:

• Author list
• Title
• Abstract
• Publisher
• Date
• Other?

[briri]

Built out a Lambda that calls DataCite and processes the results to find related works for a given DMP. The overall workflow is flawed and inefficient though.

We call DataCite for the funder NIH for 2022 for example for each relevant DMP. This approach results in too many calls to DataCite (which is slow to respond).

One interesting observation I made that will impact our final implementation was that the GraphQL API would timeout on the DataCite end if we included too many ORCIDs in the query.

It would be more efficient to follow the pattern we use for the COKI Observatory Network which we will run once a week (see issue #77) .

[briri]

We should update the Dynamo table records so that all augmentations sit within a record adjacent to the DMP ID record. Something like:

"PK": "DMP#doi.org/11.22222/A12B3c4D",
"SK": "AUGMENTATIONS"

"AUGMENTERS#datacite": {
  "last_checked": "(Timestamp of the last time the augmenter looked for matches for this DMP)",
  "modifications": "(The JSON array that we currently are storing on the DMP ID record in the 'dmphub_modifications' field"
}