Adjust input length on nextclade runs

Only run nextclade on sequences at least 1000 nt long, this would avoid
misclassification of short sequences. The dengue E gene has an approximate
length of 1400.

ingest/workflow/snakemake_rules/nextclade.smk

@@ -8,13 +8,16 @@ rule nextclade_all:
     output:
         "data/nextclade_results/nextclade_all.tsv",
     threads: 4
+    params:
+        min_length=1000,  # E gene length is approximately 1400
     shell:
         """
         nextclade run \
           --input-dataset {input.dataset} \
           -j {threads} \
           --output-tsv {output} \
           --min-match-rate 0.01 \
+          --min-length {params.min_length} \
           --silent \
           {input.sequences}
         """