Create a function to retrieve nextclade dataset metadata for a specific date

Background

On the date of model input data processing, we want to save some metadata about the current nextclade SARS-COV-2 dataset (i.e., the most current dataset listed when running nextclade dataset list --name sars-cov-2:

╭────────────────────────┬────────────────────────┬───────────────────────┬────────────────────────╮
│ name                   │ attributes             │ versions              │ capabilities           │
╞════════════════════════╪════════════════════════╪═══════════════════════╪════════════════════════╡
│ nextstrain/sars-cov-2/ │ "name"="SARS-CoV-2"    │ 2024-07-17--12-57-03Z │ clade (44)             │
│ wuhan-hu-1/orfs        │ "reference             │ 2024-07-03--08-29-55Z │ Nextclade_pango (3223) │
│ (shortcuts:            │ accession"="MN908947"  │ 2024-06-13--23-42-47Z │ clade_display (44)     │
│ "sars-cov-2", "nextstr │ "reference name"="Wuha │ 2024-04-25--01-03-07Z │ clade_nextstrain (44)  │
│ ain/sars-cov-2", "next │ n-Hu-1/2019"           │ 2024-04-15--15-08-22Z │ clade_who (13)         │
│ strain/sars-cov-2/wuha │                        │ 2024-02-16--04-00-32Z │ partiallyAliased       │
│ n-hu-1")               │                        │ 2024-01-16--20-31-02Z │ (3223)                 │
│                        │                        │                       │ qc.frameShifts         │
│                        │                        │                       │ qc.missingData         │
│                        │                        │                       │ qc.mixedSites          │
│                        │                        │                       │ qc.privateMutations    │
│                        │                        │                       │ qc.snpClusters         │
│                        │                        │                       │ qc.stopCodons          │
│                        │                        │                       │ mutLabels              │
╰────────────────────────┴────────────────────────┴───────────────────────┴────────────────────────╯

We'll need this information when it's time to score the models (~90 days after submission) to ensure that we use the correct reference tree for the clade assignments. This is also important information for reproducibility (e.g., the nextclade version used to generate the data).

Definition of done

Add a function to virus-clade-utils:

[ ] For a specific YYYY-MM-DD date, retrieve the corresponding nextclade_metadata.json file (see related incantations below)
[ ] Write the .json file to ???

reichlab / virus-clade-utils

Create a function to retrieve nextclade dataset metadata for a specific date #12