Remove obsolete HTML file for "水浒传" and update logging in main.go to exclude document knowledge base details

cmd/testdata/main.go

@@ -76,9 +76,6 @@ func run() error {
 		return fmt.Errorf("init knowledge base failed: %w", err)
 	}
 	slog.Info("knowledge base init success",
-		slog.Int64("documentKnowledgeBaseID", kbResult.DocumentKnowledgeBaseID),
-		slog.Int("createdDocuments", kbResult.CreatedDocuments),
-		slog.Int("updatedDocuments", kbResult.UpdatedDocuments),
 		slog.Int64("faqKnowledgeBaseID", kbResult.FAQKnowledgeBaseID),
 		slog.Int("createdFAQs", kbResult.CreatedFAQs),
 		slog.Int("updatedFAQs", kbResult.UpdatedFAQs),