change between to inequalities in gap detector

Alternatively, the left boundary could be excluded following the
convention from the other code. In that case the binary search would
have to be adapted too.

src/scripts/gap_detector.py

@@ -18,11 +18,11 @@
 
 DB_COUNT_QUERY = (
     "select count(*) as batches from settlements "
-    "where block_number between {{start}} and {{end}};"
+    "where block_number >= {{start}} and block_number <= {{end}};"
 )
 DB_HASH_QUERY = (
     "select concat('0x', encode(tx_hash, 'hex')) as tx_hash from settlements "
-    "where block_number between {{start}} and {{end}};"
+    "where block_number >= {{start}} and block_number <= {{end}};"
 )
 
 DUNE_COUNT_QUERY_ID = 2481826