optimize TenantLLMService.increase_usage for "can't update token usag… (#4755)

…e error " message

### What problem does this PR solve?

optimize TenantLLMService.increase_usage Performance

### Type of change

- [x] Performance Improvement

Co-authored-by: che_shuai <che_shuai@massclouds.com>

api/db/services/llm_service.py

         if not e:
             raise LookupError("Tenant not found")
 
-        if llm_type == LLMType.EMBEDDING.value:
-            mdlnm = tenant.embd_id
-        elif llm_type == LLMType.SPEECH2TEXT.value:
-            mdlnm = tenant.asr_id
-        elif llm_type == LLMType.IMAGE2TEXT.value:
-            mdlnm = tenant.img2txt_id
-        elif llm_type == LLMType.CHAT.value:
-            mdlnm = tenant.llm_id if not llm_name else llm_name
-        elif llm_type == LLMType.RERANK:
-            mdlnm = tenant.rerank_id if not llm_name else llm_name
-        elif llm_type == LLMType.TTS:
-            mdlnm = tenant.tts_id if not llm_name else llm_name
-        else:
-            assert False, "LLM type error"
+        llm_map = {
+            LLMType.EMBEDDING.value: tenant.embd_id,
+            LLMType.SPEECH2TEXT.value: tenant.asr_id,
+            LLMType.IMAGE2TEXT.value: tenant.img2txt_id,
+            LLMType.CHAT.value: tenant.llm_id if not llm_name else llm_name,
+            LLMType.RERANK.value: tenant.rerank_id if not llm_name else llm_name,
+            LLMType.TTS.value: tenant.tts_id if not llm_name else llm_name
+        }
+
+        mdlnm = llm_map.get(llm_type)
+        if mdlnm is None:
+            raise ValueError("LLM type error")
 
         llm_name, llm_factory = TenantLLMService.split_model_name_and_factory(mdlnm)
 
-        num = 0
         try:
-            if llm_factory:
-                tenant_llms = cls.query(tenant_id=tenant_id, llm_name=llm_name, llm_factory=llm_factory)
-            else:
-                tenant_llms = cls.query(tenant_id=tenant_id, llm_name=llm_name)
-            if not tenant_llms:
-                return num
-            else:
-                tenant_llm = tenant_llms[0]
-                num = cls.model.update(used_tokens=tenant_llm.used_tokens + used_tokens) \
-                    .where(cls.model.tenant_id == tenant_id, cls.model.llm_factory == tenant_llm.llm_factory, cls.model.llm_name == llm_name) \
-                    .execute()
+            num = cls.model.update(
+                used_tokens=cls.model.used_tokens + used_tokens
+            ).where(
+                cls.model.tenant_id == tenant_id,
+                cls.model.llm_name == llm_name,
+                cls.model.llm_factory == llm_factory if llm_factory else True
+            ).execute()
         except Exception:
-            logging.exception("TenantLLMService.increase_usage got exception")
+            logging.exception(
+                "TenantLLMService.increase_usage got exception,Failed to update used_tokens for tenant_id=%s, llm_name=%s",
+                tenant_id, llm_name)
+            return 0
+
         return num
 
     @classmethod