feat: events table type column index (#7838)

Adding index on even table type column, since we are running queries on
top of it.

src/migrations/20240812132633-events-type-index.js

@@ -0,0 +1,19 @@
+'use strict';
+
+exports.up = function (db, callback) {
+    db.runSql(
+        `
+        CREATE INDEX idx_events_type ON events (type);
+        `,
+        callback,
+    );
+};
+
+exports.down = function (db, callback) {
+    db.runSql(
+        `
+        DROP INDEX IF EXISTS idx_events_type;
+        `,
+        callback,
+    );
+};