[Bug]: Hybrid search reports an error when adding the 'create at' time parameter as a filter

[Ripcord55]

Describe the bug

Hybrid search reports an error when adding the 'create at' time parameter as a filter

Environment

0.5.3

Fast reproduce steps

1. Turn on the switch for OCEANBASE_ENABLE_NATIVE_HYBRID
2. Add the parameter 'creat_at' as the filter content during search，like：filters = {"created_at": {"$gt": first_created_at}}

Expected behavior

N/A

Actual behavior

N/A

Additional context

N/A