fix: scope of resp if breakpoint does not occur on an exon (#274)

Fix scope of resp if breakpoint does not occur on an exon

src/cool_seq_tool/mappers/exon_genomic_coords.py

@@ -592,7 +592,7 @@ async def _genomic_to_transcript_exon_coordinate(
                 )
                 params["strand"] = strand.value
                 resp.transcript_exon_data = TranscriptExonData(**params)
-            return resp
+                return resp
 
         if alt_ac:
             # Check if valid accession is given