Add pagerank to KB. (#3809)

### What problem does this PR solve?

#3794

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

api/apps/chunk_app.py

@@ -227,12 +227,18 @@ def create():
             return get_data_error_result(message="Document not found!")
         d["kb_id"] = [doc.kb_id]
         d["docnm_kwd"] = doc.name
+        d["title_tks"] = rag_tokenizer.tokenize(doc.name)
         d["doc_id"] = doc.id
 
         tenant_id = DocumentService.get_tenant_id(req["doc_id"])
         if not tenant_id:
             return get_data_error_result(message="Tenant not found!")
 
+        e, kb = KnowledgebaseService.get_by_id(doc.kb_id)
+        if not e:
+            return get_data_error_result(message="Knowledgebase not found!")
+        if kb.pagerank: d["pagerank_fea"] = kb.pagerank
+
         embd_id = DocumentService.get_embd_id(req["doc_id"])
         embd_mdl = LLMBundle(tenant_id, LLMType.EMBEDDING.value, embd_id)