Add new models and database manager

src/models/Base.py

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+from sqlalchemy.orm import declarative_base
+
+Base = declarative_base()

src/models/DatabaseManager.py

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+import os
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import Session, sessionmaker
+
+from . import Base
+
+engine = create_engine(f"sqlite:///local/database/db.db")
+
+SessionLocal = sessionmaker(bind=engine)
+
+
+def init_db():
+    Base.metadata.create_all(engine)
+    pass

src/models/File.py

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+from . import Base
+from typing import Optional
+from sqlalchemy import String, Column, JSON, Integer
+from sqlalchemy.ext.mutable import MutableDict
+
+
+class File(Base):
+    __tablename__ = "files"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    provider: str = Column(String, nullable=False)
+    type: str = Column(String, nullable=True)
+    path: str = Column(String, nullable=False)
+    data: dict = Column(MutableDict.as_mutable(JSON), nullable=False, default={})

src/models/__init__.py

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+from .Base import Base
+from .DatabaseManager import SessionLocal, init_db
+from .File import File