Remove numericality as it's redandant with integer column and validates nil IID

app/models/concerns/atomic_internal_id.rb

@@ -27,7 +27,7 @@ module AtomicInternalId
   module ClassMethods
     def has_internal_id(column, scope:, init:, presence: true) # rubocop:disable Naming/PredicateName
       before_validation :"ensure_#{scope}_#{column}!", on: :create
-      validates column, presence: presence, numericality: true
+      validates column, presence: presence
 
       define_method("ensure_#{scope}_#{column}!") do
         scope_value = association(scope).reader

spec/lib/gitlab/import_export/safe_model_attributes.yml

@@ -228,6 +228,7 @@ Ci::Pipeline:
 - config_source
 - failure_reason
 - protected
+- iid
 Ci::Stage:
 - id
 - name

spec/models/ci/build_spec.rb

@@ -1517,6 +1517,7 @@ describe Ci::Build do
         { key: 'CI_PROJECT_URL', value: project.web_url, public: true },
         { key: 'CI_PROJECT_VISIBILITY', value: 'private', public: true },
         { key: 'CI_PIPELINE_ID', value: pipeline.id.to_s, public: true },
+        { key: 'CI_PIPELINE_IID', value: pipeline.iid.to_s, public: true },
         { key: 'CI_CONFIG_PATH', value: pipeline.ci_yaml_file_path, public: true },
         { key: 'CI_PIPELINE_SOURCE', value: pipeline.source, public: true },
         { key: 'CI_COMMIT_MESSAGE', value: pipeline.git_commit_message, public: true },

spec/support/shared_examples/models/atomic_internal_id_spec.rb

@@ -12,14 +12,13 @@ shared_examples_for 'AtomicInternalId' do
 
     describe 'Validation' do
       before do
-        allow_any_instance_of(described_class).to receive(:ensure_iid!) {}
+        allow_any_instance_of(described_class).to receive(:"ensure_#{scope_attrs.keys.first}_#{internal_id_attribute}!") {}
       end
 
       it 'validates presence' do
         instance.valid?
 
         expect(instance.errors[:iid]).to include("can't be blank") if validate_presence
-        expect(instance.errors[:iid]).to include("is not a number") # numericality
       end
     end