Add target and source branch data to entity

ee/app/serializers/merge_request_compliance_entity.rb

@@ -24,9 +24,13 @@ class MergeRequestComplianceEntity < Grape::Entity
   expose :approved_by_users, using: API::Entities::UserBasic
 
   expose :pipeline_status, if: -> (*) { can_read_pipeline? }, with: DetailedStatusEntity
-
   expose :approval_status
 
+  expose :target_branch
+  expose :target_branch_uri, if: -> (merge_request) { merge_request.target_branch_exists? }
+  expose :source_branch
+  expose :source_branch_uri, if: -> (merge_request) { merge_request.source_branch_exists? }
+
   private
 
   alias_method :merge_request, :object
@@ -53,4 +57,12 @@ class MergeRequestComplianceEntity < Grape::Entity
 
     SUCCESS_APPROVAL_STATUS
   end
+
+  def target_branch_uri
+    project_ref_path(merge_request.project, merge_request.target_branch)
+  end
+
+  def source_branch_uri
+    project_ref_path(merge_request.project, merge_request.source_branch)
+  end
 end

ee/changelogs/unreleased/216279-add-source-and-destination-branch-data-to-compliance-entity.yml

+---
+title: Add source and destination branch data to compliance entity
+merge_request: 37630
+author:
+type: added

ee/spec/serializers/merge_request_compliance_entity_spec.rb

@@ -17,7 +17,19 @@ RSpec.describe MergeRequestComplianceEntity do
 
     it 'includes merge request attributes for compliance' do
       expect(subject).to include(
-        :id, :title, :merged_at, :milestone, :path, :issuable_reference, :author, :approved_by_users, :approval_status
+        :id,
+        :title,
+        :merged_at,
+        :milestone,
+        :path,
+        :issuable_reference,
+        :author,
+        :approved_by_users,
+        :approval_status,
+        :target_branch,
+        :target_branch_uri,
+        :source_branch,
+        :source_branch_uri
       )
     end