refactor: move the embedding to the rag module and abstract the rerank runner for extension (#9423)

api/core/rag/datasource/vdb/chroma/chroma_vector.py

@@ -6,10 +6,10 @@ from chromadb import QueryResult, Settings
 from pydantic import BaseModel
 
 from configs import dify_config
-from core.rag.datasource.entity.embedding import Embeddings
 from core.rag.datasource.vdb.vector_base import BaseVector
 from core.rag.datasource.vdb.vector_factory import AbstractVectorFactory
 from core.rag.datasource.vdb.vector_type import VectorType
+from core.rag.embedding.embedding_base import Embeddings
 from core.rag.models.document import Document
 from extensions.ext_redis import redis_client
 from models.dataset import Dataset