fix: optimize contract event list db index (#2258)

Author: rafaelcr

migrations/1744989709876_contract-logs-events-index.js

@@ -0,0 +1,47 @@
+/* eslint-disable camelcase */
+
+exports.shorthands = undefined;
+
+exports.up = pgm => {
+  pgm.dropIndex('contract_logs', 'contract_identifier');
+  pgm.dropIndex('contract_logs', [
+    { name: 'block_height', sort: 'DESC' },
+    { name: 'microblock_sequence', sort: 'DESC' },
+    { name: 'tx_index', sort: 'DESC' },
+    { name: 'event_index', sort: 'DESC' },
+  ]);
+
+  pgm.createIndex(
+    'contract_logs',
+    [
+      'contract_identifier',
+      { name: 'block_height', sort: 'DESC' },
+      { name: 'microblock_sequence', sort: 'DESC' },
+      { name: 'tx_index', sort: 'DESC' },
+      { name: 'event_index', sort: 'DESC' },
+    ],
+    { where: 'canonical = TRUE AND microblock_canonical = TRUE' }
+  );
+};
+
+exports.down = pgm => {
+  pgm.dropIndex(
+    'contract_logs',
+    [
+      'contract_identifier',
+      { name: 'block_height', sort: 'DESC' },
+      { name: 'microblock_sequence', sort: 'DESC' },
+      { name: 'tx_index', sort: 'DESC' },
+      { name: 'event_index', sort: 'DESC' },
+    ],
+    { where: 'canonical = TRUE AND microblock_canonical = TRUE' }
+  );
+
+  pgm.createIndex('contract_logs', 'contract_identifier');
+  pgm.createIndex('contract_logs', [
+    { name: 'block_height', sort: 'DESC' },
+    { name: 'microblock_sequence', sort: 'DESC' },
+    { name: 'tx_index', sort: 'DESC' },
+    { name: 'event_index', sort: 'DESC' },
+  ]);
+};