feat: update summary to be a text field

app/models/conversation.rb

@@ -14,7 +14,7 @@
 #  priority               :integer
 #  snoozed_until          :datetime
 #  status                 :integer          default("open"), not null
-#  summary                :string
+#  summary                :text
 #  summary_generated_at   :datetime
 #  uuid                   :uuid             not null
 #  waiting_since          :datetime

db/migrate/20230717075819_add_summary_fields_to_conversations.rb

@@ -1,6 +1,6 @@
 class AddSummaryFieldsToConversations < ActiveRecord::Migration[7.0]
   def change
-    add_column :conversations, :summary, :string
+    add_column :conversations, :summary, :text
     add_column :conversations, :summary_generated_at, :datetime
   end
 end

db/schema.rb

@@ -451,7 +451,7 @@ ActiveRecord::Schema[7.0].define(version: 2023_07_17_075819) do
     t.integer "priority"
     t.datetime "waiting_since"
     t.bigint "sla_policy_id"
-    t.string "summary"
+    t.text "summary"
     t.datetime "summary_generated_at"
     t.index ["account_id", "display_id"], name: "index_conversations_on_account_id_and_display_id", unique: true
     t.index ["account_id", "id"], name: "index_conversations_on_id_and_account_id"