fix: update application test to find config templates in infrastructure layer

- Update application test to look for templates in infrastructure/config/templates/application
- Fixes CI warning about missing application/config/templates directory
- Aligns with twelve-factor architecture where config is managed at infrastructure layer
- Resolves final CI warning before staging deployment testing

Author: josecelano

application/tests/test-unit-application.sh

@@ -94,12 +94,12 @@ test_application_config() {
         log_info "No environment files found (normal for CI, generated during deployment)"
     fi
 
-    # Test that configuration templates exist
-    local template_dir="${APPLICATION_ROOT}/config/templates"
+    # Test that configuration templates exist (in infrastructure layer)
+    local template_dir="${PROJECT_ROOT}/infrastructure/config/templates/application"
     if [[ -d "${template_dir}" ]]; then
-        log_info "Configuration templates directory found: ${template_dir}"
+        log_info "Application configuration templates found: ${template_dir}"
     else
-        log_warning "Configuration templates directory not found: ${template_dir}"
+        log_warning "Application configuration templates not found: ${template_dir}"
     fi
 
     if [[ ${failed} -eq 0 ]]; then