add mysql support

db/migrate/20230516180929_create_templates.rb

@@ -5,9 +5,9 @@ class CreateTemplates < ActiveRecord::Migration[7.0]
     create_table :templates do |t|
       t.string :slug, null: false, index: { unique: true }
       t.string :name, null: false
-      t.string :schema, null: false
-      t.string :fields, null: false
-      t.string :submitters, null: false
+      t.text :schema, null: false
+      t.text :fields, null: false
+      t.text :submitters, null: false
 
       t.references :author, null: false, foreign_key: { to_table: :users }, index: true
       t.references :account, null: false, foreign_key: true, index: true

db/migrate/20230612182744_create_submitters.rb

@@ -8,7 +8,7 @@ class CreateSubmitters < ActiveRecord::Migration[7.0]
       t.string :uuid, null: false
       t.string :email, null: false, index: true
       t.string :slug, null: false, index: { unique: true }
-      t.string :values, null: false
+      t.text :values, null: false
       t.string :ua
       t.string :ip