fix: drep activity calculation

Author: MSzalowski

CHANGELOG.md

@@ -16,7 +16,7 @@ changes.
 
 ### Fixed
 
--
+- Fix calculating DRep activity
 
 ### Changed
 

govtool/backend/sql/list-dreps.sql

@@ -44,7 +44,7 @@ SELECT DISTINCT ON (dh.raw)
   encode(va.data_hash, 'hex'),
   dr_deposit.deposit,
   DRepDistr.amount,
-  (DRepActivity.epoch_no - GREATEST(MAX(COALESCE(block.epoch_no, block_first_register.epoch_no)), lve.epoch_no)) <= DRepActivity.drep_activity AS active,
+  (DRepActivity.epoch_no - GREATEST(COALESCE(block.epoch_no, block_first_register.epoch_no), lve.epoch_no, newestRegister.epoch_no)) <= DRepActivity.drep_activity AS active,
   encode(dr_voting_anchor.tx_hash, 'hex') AS tx_hash,
   newestRegister.time AS last_register_time,
   COALESCE(latestDeposit.deposit, 0),