feat: move article to models folder

models/article.py

@@ -0,0 +1,17 @@
+import sqlalchemy
+from pgvector.sqlalchemy import Vector
+from sqlalchemy.orm import declarative_base
+
+Base = declarative_base()  # type: Any
+
+
+class Article(Base):
+    """Embedding store."""
+
+    __tablename__ = "article"
+
+    id = sqlalchemy.Column(sqlalchemy.Integer, primary_key=True, nullable=False)
+    title = sqlalchemy.Column(sqlalchemy.String, nullable=True)
+    abstract = sqlalchemy.Column(sqlalchemy.String, nullable=True)
+    embedding: Vector = sqlalchemy.Column("abstract_embedding", Vector(None))
+    doi = sqlalchemy.Column(sqlalchemy.String, nullable=True)

vector_store.py

@@ -13,7 +13,7 @@ from langchain.vectorstores.base import VectorStore
 from sqlalchemy import delete, text
 from sqlalchemy.orm import Session
 
-from model import Article
+from models.article import Article
 from models.distance import DistanceStrategy, distance_strategy_limit
 from utils import str_to_list