Changed the the request header in TriggerWorkflowController to handle Complex hash

src/api/app/services/workflows/yaml_to_workflows_service.rb

@@ -47,10 +47,10 @@ def parse_workflow_configuration(workflow_configuration)
 
       # Mapping the placeholder variables to their values from the webhook event payload
       placeholder_variables = SUPPORTED_PLACEHOLDER_VARIABLES.zip([scm_organization_name, scm_repository_name, pr_number, commit_sha, label]).to_h
-      begin
-        format(workflow_configuration, placeholder_variables)
-      rescue ArgumentError => e
-        raise Token::Errors::WorkflowsYamlFormatError, e.message
+      # Explicit substitution via gsub allows safe use of placeholders
+      workflow_configuration.gsub(/%\{([A-Za-z0-9_]+)\}/) do |match|
+        key = Regexp.last_match(1).to_sym
+        placeholder_variables.fetch(key, match)
       end
     end
 

src/api/spec/fixtures/files/workflows_with_percent.yml

@@ -0,0 +1,10 @@
+workflow_percent:
+  steps:
+    - branch_package:
+        source_project: "test-project:percent"
+        source_package: "test-package:54%f"
+        target_project: "test-target-project"
+  filters:
+    branches:
+      only:
+        - 'main'

src/api/spec/services/workflows/yaml_to_workflows_service_spec.rb

@@ -67,8 +67,19 @@
       let(:workflows_yml_file) { file_fixture('unparsable_workflows_placeholders.yml') }
       let(:request_payload) { workflow_run_github_payload }
 
-      it 'raises a user-friendly error' do
-        expect { subject }.to raise_error(Token::Errors::WorkflowsYamlNotParsable, 'Unable to parse .obs/workflows.yml: malformed format string - %S')
+      it 'keeps the original string' do
+        expect { subject }.not_to raise_error
+        expect(subject.first.workflow_instructions[:steps].first[:branch_package][:source_package]).to eq('test-package:%u')
+      end
+    end
+
+    context 'with %f in content' do
+      let(:workflows_yml_file) { file_fixture('workflows_with_percent.yml') }
+      let(:request_payload) { workflow_run_github_payload }
+
+      it 'does not crash and preserves the %f' do
+        expect { subject }.not_to raise_error
+        expect(subject.first.workflow_instructions[:steps].first[:branch_package][:source_package]).to eq('test-package:54%f')
       end
     end
   end