feat: Added Instagram channel migration (#11181)

This PR is part of https://github.com/chatwoot/chatwoot/pull/11054 to
make the review cycle easier.

db/migrate/20250326034635_add_instagram_channel.rb

@@ -0,0 +1,13 @@
+class AddInstagramChannel < ActiveRecord::Migration[7.0]
+  def change
+    create_table :channel_instagram do |t|
+      t.string :access_token, null: false
+      t.datetime :expires_at, null: false
+      t.integer :account_id, null: false
+      t.string :instagram_id, null: false
+      t.timestamps
+    end
+
+    add_index :channel_instagram, :instagram_id, unique: true
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2025_03_15_202035) do
+ActiveRecord::Schema[7.0].define(version: 2025_03_26_034635) do
   # These extensions should be enabled to support this database
   enable_extension "pg_stat_statements"
   enable_extension "pg_trgm"
@@ -377,6 +377,16 @@ ActiveRecord::Schema[7.0].define(version: 2025_03_15_202035) do
     t.index ["page_id"], name: "index_channel_facebook_pages_on_page_id"
   end
 
+  create_table "channel_instagram", force: :cascade do |t|
+    t.string "access_token", null: false
+    t.datetime "expires_at", null: false
+    t.integer "account_id", null: false
+    t.string "instagram_id", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["instagram_id"], name: "index_channel_instagram_on_instagram_id", unique: true
+  end
+
   create_table "channel_line", force: :cascade do |t|
     t.integer "account_id", null: false
     t.string "line_channel_id", null: false