Restructure omni services and add Chatwoot research snapshot

research/chatwoot/db/migrate/20250806140003_create_inbox_capacity_limits.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+class CreateInboxCapacityLimits < ActiveRecord::Migration[7.1]
+  def change
+    create_table :inbox_capacity_limits do |t|
+      t.references :agent_capacity_policy, null: false, index: true
+      t.references :inbox, null: false, index: true
+      t.integer :conversation_limit, null: false
+
+      t.timestamps
+    end
+
+    add_index :inbox_capacity_limits, [:agent_capacity_policy_id, :inbox_id], unique: true
+  end
+end