add new vrs fields to schema

Author: ch-kr

browser/help/topics/v4-hts.md

@@ -781,8 +781,10 @@ Row fields:
   - `vrs`: Struct containing information related to the Global Alliance for Genomic Health (GA4GH) Variant Representation Specification ([VRS](https://vrs.ga4gh.org/en/stable/)) standard.
     - `VRS_Allele_IDS`: The computed identifiers for the GA4GH VRS Alleles corresponding to the values in the alleles column.
     - `VRS_Starts`: Interresidue coordinates used as the location starts for the GA4GH VRS Alleles corresponding to the values in the alleles column.
-    - `VRS_Ends`: Interresidue coordinates used as the location ends for the GA4GH VRS Alleles corresponding to the values in the alleles column
+    - `VRS_Ends`: Interresidue coordinates used as the location ends for the GA4GH VRS Alleles corresponding to the values in the alleles column.
     - `VRS_States`: The literal sequence states used for the GA4GH VRS Alleles corresponding to the values in the alleles column.
+    - `VRS_Lengths`: The length values from ReferenceLengthExpression states for the GA4GH VRS Alleles corresponding to the GT indexes of the reference and alternate alleles.
+    - `VRS_RepeatSubunitLengths`: The repeatSubunitLength values from ReferenceLengthExpression states for the GA4GH VRS Alleles corresponding to the GT indexes of the reference and alternate alleles..
 - `vep`: Consequence annotations from Ensembl VEP. More details about VEP output is described [here](https://ensembl.org/info/docs/tools/vep/vep_formats.html#output). VEP was run using the LOFTEE plugin and information about the additional LOFTEE annotations can be found [here](https://github.com/konradjk/loftee).
 - `vqsr_results`: VQSR related variant annotations.
   - `AS_VQSLOD`: Allele-specific log-odds ratio of being a true variant versus being a false positive under the trained VQSR Gaussian mixture model.