Adds column and index to auto_established_claims (#21488)

Author: stiehlrod

db/migrate/20250328181026_add_header_hash_to_claims_api_auto_established_claim.rb

@@ -0,0 +1,5 @@
+class AddHeaderHashToClaimsApiAutoEstablishedClaim < ActiveRecord::Migration[7.2]
+  def change
+    add_column :claims_api_auto_established_claims, :header_hash, :string
+  end
+end

db/migrate/20250328181133_add_index_header_hash_to_claims_api_auto_established_claim.rb

@@ -0,0 +1,7 @@
+class AddIndexHeaderHashToClaimsApiAutoEstablishedClaim < ActiveRecord::Migration[7.2]
+  disable_ddl_transaction!
+
+  def change
+    add_index :claims_api_auto_established_claims, :header_hash, algorithm: :concurrently
+  end
+end