The fasttext library is missing, and it is used in the operators.py file. (#925)

### 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)

requirements.txt

@@ -134,3 +134,4 @@ yarl==1.9.4
 zhipuai==2.0.1
 BCEmbedding
 loguru==0.7.2
+fasttext==0.9.2

requirements_dev.txt

@@ -122,3 +122,4 @@ BCEmbedding
 loguru==0.7.2
 ollama==0.1.8
 redis==5.0.4
+fasttext==0.9.2