feat(DIST-S1): support multiple product-id-times. fix historical-mode detection

Author: chrisjrd

data_subscriber/rtc_for_dist/rtc_for_dist_query.py

@@ -274,6 +274,7 @@ def acq_time_from_product_id_time(p):
                         continue
                     product_id_time = f"{product},{acquisition_dts}"
                     product_id_times.add(product_id_time)
+                product_id_times = list(product_id_times)
                 product_id_times = sorted(product_id_times, key=acq_time_from_product_id_time)
 
                 # collect all product-id-times in this historical timerange (global)