### What problem does this PR solve?
fix function create to slove the problem of creating a chunk and
increasing the chunk number by 2.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue) #900
---------
Signed-off-by: seaver <zhudan187@qq.com>
### What problem does this PR solve?
fix bug: [1159](https://github.com/infiniflow/ragflow/issues/1159)
using embd which user configured at knowledgebase when create new chunk
in database
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
feat: add rerank models to the project #724#162
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._
Issue link:#[[Link the issue
here](https://github.com/infiniflow/ragflow/issues/209)]
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
