Moved models to shared base

app/db/base.py

@@ -1,9 +1,8 @@
-from sqlalchemy.orm import declarative_base
+from app.db.base_class import Base  # noqa: F401
 
+# Import all models so their tables are registered on Base.metadata
+from app.models.user import User         # noqa: F401
+from app.models.server import Server     # noqa: F401
+from app.models.sshkey import SSHKey     # noqa: F401
 from app.models.access_request import AccessRequest  # noqa: F401
-from app.models.audit import AuditEvent  # noqa: F401
-from app.models.server import Server  # noqa: F401
-from app.models.sshkey import SSHKey  # noqa: F401
-from app.models.user import User  # noqa: F401
-
-Base = declarative_base()
+from app.models.audit import AuditEvent   # noqa: F401