Show errors during loading

CHDataManagement/Model/Loading/LoadingContext.swift

@@ -105,6 +105,12 @@ final class LoadingContext {
                 return nil
             }
             return tagOverview
+        case .file:
+            guard let id = itemId.id else {
+                error("Missing file id in itemId")
+                return nil
+            }
+            return file(id)
         }
     }
 }

CHDataManagement/Model/Loading/ModelLoader.swift

@@ -1,4 +1,17 @@
 
+final class LoadingErrorHandler: SecurityBookmarkErrorDelegate {
+
+    let context: LoadingContext
+
+    init(context: LoadingContext) {
+        self.context = context
+    }
+
+    func securityBookmark(error: String) {
+        context.error("\(error)")
+    }
+}
+
 final class ModelLoader {
 
     let content: Content
@@ -7,10 +20,14 @@ final class ModelLoader {
 
     let context: LoadingContext
 
+    let errorHandler: LoadingErrorHandler
+
     init(content: Content, storage: Storage) {
         self.content = content
         self.storage = storage
         self.context = .init(content: content)
+        self.errorHandler = .init(context: context)
+        storage.contentScope?.delegate = errorHandler
     }
 
     func load() -> LoadingResult {