fix(mysql-mariadb): change `dns_last_result column` from `VARCHAR(255)` to `TEXT` (#6571)

db/knex_migrations/2026-01-02-0551-dns-last-result-to-text.js

@@ -0,0 +1,14 @@
+// Change dns_last_result column from VARCHAR(255) to TEXT to handle longer DNS TXT records
+exports.up = function (knex) {
+    return knex.schema
+        .alterTable("monitor", function (table) {
+            table.text("dns_last_result").alter();
+        });
+};
+
+exports.down = function (knex) {
+    return knex.schema
+        .alterTable("monitor", function (table) {
+            table.string("dns_last_result", 255).alter();
+        });
+};