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Various seasonal-cov improvements #43

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@genehack genehack commented Dec 18, 2024

Description of proposed changes

  • Locks clock rate for 229E and OC43
  • Various best practices updates:
    • use "raw" string quoting
    • use abbreviated authors as "authors", full author as "full authors"
    • use recommended TSV handling best practices
  • Add frequencies panel
  • Excludes some HKU1 and NL63 strains to improve tree rooting

PREVIEWS ON STAGING

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  • Checks pass

With these strains included, the HKU1 tree roots badly — these fall in
between the two effective clades in the tree, causing the root to not
be properly positioned in between them.
This is all sequences (as of ~15 Dec 2024) with >6k Ns or <80%
coverage. This was determined by exporting the Nextstrain tree over to
Nextclade, dropping the entire Nextstrain sequences.fasta on the
Nextclade tree, then filtering/sorting samples by both N count and
coverage percentage.
As suggested by Trevor.
Verified that metadata file outputs are unchanged by this revision.
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