Restructure omni services and add Chatwoot research snapshot

research/chatwoot/db/migrate/20251027091242_add_tiktok_channel.rb

@@ -0,0 +1,15 @@
+class AddTiktokChannel < ActiveRecord::Migration[7.1]
+  def change
+    create_table :channel_tiktok do |t|
+      t.integer :account_id, null: false
+      t.string :business_id, null: false
+      t.string :access_token, null: false
+      t.datetime :expires_at, null: false
+      t.string :refresh_token, null: false
+      t.datetime :refresh_token_expires_at, null: false
+      t.timestamps
+    end
+
+    add_index :channel_tiktok, :business_id, unique: true
+  end
+end