fix: update gene listing query to fetch distinct HGNC from transcripts

In newer versions of UTA, the gene table has become overrun with mRNA, mitochondrial genes, etc. that polute the result list. Since the real purpose of this endpoint is to list the genes for which we can link transcripts, this query edits the query to select distinct HGNC names from the transcripts table.

Author: bencap

src/mavedb/routers/hgvs.py

@@ -93,7 +93,9 @@ def list_genes():
     """
     # Even though it doesn't provide the most complete transcript pool, UTA does provide more direct
     # access to a complete list of genes which have transcript information available.
-    return list(chain.from_iterable(hgvs.dataproviders.uta.connect()._fetchall("select hgnc from gene")))
+    return list(
+        chain.from_iterable(hgvs.dataproviders.uta.connect()._fetchall("SELECT DISTINCT hgnc FROM transcript;"))
+    )
 
 
 @router.get("/genes/{gene}", status_code=200, response_model=dict[str, Any], summary="Show stored gene information")