feat: pg half vector (#6201)

projects/app/.env.template

@@ -54,6 +54,7 @@ MONGODB_URI="mongodb://myusername:mypassword@localhost:27017/fastgpt?authSource=
 MONGODB_LOG_URI="mongodb://myusername:mypassword@localhost:27017/fastgpt?authSource=admin&directConnection=true"
 # 向量库优先级: pg > oceanbase > milvus
 # PG 向量库连接参数
+VECTOR_VQ_LEVEL=16 # 向量量化等级（目前支持 PG：32,16， 其他数据库未支持）
 PG_URL=postgresql://username:password@localhost:5432/postgres
 # OceanBase 向量库连接参数
 # OCEANBASE_URL=

projects/app/src/components/core/ai/AISettingModal/index.tsx

@@ -396,7 +396,10 @@ const AIChatSettingsModal = ({
         {responseFormat === 'json_schema' && (
           <Flex {...FlexItemStyles} h="auto">
             <Box {...LabelStyles}>
-              <Flex alignItems={'center'}>JSON Schema</Flex>
+              <Flex alignItems={'center'}>
+                <Box>JSON Schema</Box>
+                <QuestionTip label={t('app:json_schema_tip')} />
+              </Flex>
             </Box>
             <Box flex={'1 0 0'}>
               <JsonEditor