Add conditional index on idr_trans_obslt_ts

Author: marshallweekley-eng

apps/bfd-db-migrator-ng/migrations/V1_35_1__add_bene_ma_part_d_rx_obs_date_idx.sql

@@ -1 +1 @@
-CREATE INDEX ON idr.beneficiary_ma_part_d_enrollment_rx(idr_trans_obslt_ts);
+CREATE INDEX ON idr.beneficiary_ma_part_d_enrollment_rx(idr_trans_obslt_ts) WHERE idr_trans_obslt_ts < '9999-12-31';