use ops closed at

models/gold/operations/core__ez_operations.sql

@@ -61,6 +61,8 @@ WITH operations AS (
         source_account AS op_source_account,
         op_source_account_muxed,
         account AS op_account_id,
+        closed_at,
+        block_timestamp,
         amount,
         asset,
         asset_code,
@@ -239,8 +241,6 @@ ledgers AS (
         previous_ledger_hash,
         transaction_count,
         operation_count AS ledger_operation_count,
-        closed_at,
-        closed_at AS block_timestamp,
         id AS ledger_id,
         total_coins,
         fee_pool,
@@ -381,8 +381,8 @@ SELECT
     o.operation_result_code,
     o.operation_trace_code,
     o.details_json,
-    l.closed_at,
-    l.block_timestamp,
+    o.closed_at,
+    o.block_timestamp,
     t.transaction_hash,
     t.ledger_sequence,
     t.tx_account,