feat(templates): persist reusable content requirements

src/govoplan_templates/backend/capabilities.py

@@ -146,7 +146,16 @@ class SqlTemplateContentLibrary(TemplateContentLibraryProvider):
                 template_type=request.template_type,
                 usages=list(request.usages),
                 locale=request.locale,
-                required_fields=[],
+                required_fields=[
+                    {
+                        "path": field.path,
+                        "value_type": field.value_type,
+                        "label": field.label,
+                        "required": field.required,
+                        "description": field.description,
+                    }
+                    for field in request.required_fields
+                ],
                 output_profiles=[],
                 content_text=request.content_text,
                 content_html=request.content_html,
@@ -168,6 +177,11 @@ class SqlTemplateContentLibrary(TemplateContentLibraryProvider):
                 "definition_hash": revision.definition_hash,
                 "template_type": revision.template_type,
                 "usages": list(revision.usages or []),
+                "required_fields": [
+                    str(field.get("path") or "")
+                    for field in revision.required_fields or []
+                    if field.get("path")
+                ],
                 "source": "content_library_capability",
             },
             commit=False,