Fix batch requests

app.py

@@ -220,7 +220,7 @@ def find_documents_batch(request: BatchDocRequest):
     missing = []
     
     for doc_id in request.doc_ids:
-        finder = TsgDocFinder() if request.doc_id[0].isalpha() else SpecDocFinder()
+        finder = TsgDocFinder() if doc_id[0].isalpha() else SpecDocFinder()
         result = finder.search_document(doc_id)
         if "not found" not in result and "Could not" not in result:
             results[doc_id] = result