feat(perf): contact page loading speed (#7629)

db/migrate/20230727065605_add_partial_index_contact_account_id.rb

@@ -0,0 +1,8 @@
+class AddPartialIndexContactAccountId < ActiveRecord::Migration[7.0]
+  disable_ddl_transaction!
+
+  def change
+    add_index :contacts, [:account_id], where: "(email <> '' OR phone_number <> '' OR identifier <> '')",
+                                        name: 'index_resolved_contact_account_id', algorithm: :concurrently
+  end
+end