ui: set default varchar max length to 1024

Signed-off-by: ryjiang <jiangruiyi@gmail.com>

client/src/consts/default.ts

@@ -1,5 +1,5 @@
 export const DEFAULT_ATTU_MAX_CAPACITY = 64;
-export const DEFAULT_ATTU_VARCHAR_MAX_LENGTH = 32;
+export const DEFAULT_ATTU_VARCHAR_MAX_LENGTH = 1024;
 export const DEFAULT_ATTU_ELEMENT_TYPE = 4; // int32
 export const DEFAULT_ATTU_DIM = 128;
 export const MIN_INT64 = `-9223372036854775807`; // safe int64 min value