Fix: shared KB embedding authorization for team members (#13809)

### What problem does this PR solve?

fixes issue #13799 where team members get model not authorized when
running RAG on an admin-shared knowledge base after the admin changes
the KB embedding model (for example to bge-m3).

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

Author: 6ba3i

api/db/services/dialog_service.py

@@ -257,8 +257,9 @@ def get_models(dialog):
         raise Exception("**ERROR**: Knowledge bases use different embedding models.")
 
     if embedding_list:
-        embd_model_config = get_model_config_by_type_and_name(dialog.tenant_id, LLMType.EMBEDDING, embedding_list[0])
-        embd_mdl = LLMBundle(dialog.tenant_id, embd_model_config)
+        embd_owner_tenant_id = kbs[0].tenant_id
+        embd_model_config = get_model_config_by_type_and_name(embd_owner_tenant_id, LLMType.EMBEDDING, embedding_list[0])
+        embd_mdl = LLMBundle(embd_owner_tenant_id, embd_model_config)
         if not embd_mdl:
             raise LookupError("Embedding model(%s) not found" % embedding_list[0])
 
@@ -1367,8 +1368,9 @@ async def async_ask(question, kb_ids, tenant_id, chat_llm_name=None, search_conf
 
     is_knowledge_graph = all([kb.parser_id == ParserType.KG for kb in kbs])
     retriever = settings.retriever if not is_knowledge_graph else settings.kg_retriever
-    embd_model_config = get_model_config_by_type_and_name(tenant_id, LLMType.EMBEDDING, embedding_list[0])
-    embd_mdl = LLMBundle(tenant_id, embd_model_config)
+    embd_owner_tenant_id = kbs[0].tenant_id
+    embd_model_config = get_model_config_by_type_and_name(embd_owner_tenant_id, LLMType.EMBEDDING, embedding_list[0])
+    embd_mdl = LLMBundle(embd_owner_tenant_id, embd_model_config)
     chat_model_config = get_model_config_by_type_and_name(tenant_id, LLMType.CHAT, chat_llm_name)
     chat_mdl = LLMBundle(tenant_id, chat_model_config)
     if rerank_id:
@@ -1449,9 +1451,11 @@ async def gen_mindmap(question, kb_ids, tenant_id, search_config={}):
     tenant_ids = list(set([kb.tenant_id for kb in kbs]))
     if tenant_embedding_list[0]:
         embd_model_config = get_model_config_by_id(tenant_embedding_list[0])
+        embd_owner_tenant_id = kbs[0].tenant_id
     else:
-        embd_model_config = get_model_config_by_type_and_name(tenant_id, LLMType.EMBEDDING, kbs[0].embd_id)
-    embd_mdl = LLMBundle(tenant_id, embd_model_config)
+        embd_owner_tenant_id = kbs[0].tenant_id
+        embd_model_config = get_model_config_by_type_and_name(embd_owner_tenant_id, LLMType.EMBEDDING, kbs[0].embd_id)
+    embd_mdl = LLMBundle(embd_owner_tenant_id, embd_model_config)
     chat_id = search_config.get("chat_id", "")
     if chat_id:
         chat_model_config = get_model_config_by_type_and_name(tenant_id, LLMType.CHAT, chat_id)