Add UserSettings model (ref #1774)

fractal_server/app/models/__init__.py

@@ -7,5 +7,6 @@
 from .linkuserproject import LinkUserProject  # noqa: F401
 from .linkuserproject import LinkUserProjectV2  # noqa: F401
 from .security import *  # noqa
+from .user_settings import UserSettings  # noqa
 from .v1 import *  # noqa
 from .v2 import *  # noqa

fractal_server/app/models/user_settings.py

@@ -0,0 +1,17 @@
+from typing import Optional
+
+from sqlmodel import Field
+from sqlmodel import SQLModel
+
+
+class UserSettings(SQLModel, table=True):
+    __tablename__ = "user_settings"
+
+    id: Optional[int] = Field(default=None, primary_key=True)
+
+    # Actual settings columns
+    ssh_host: Optional[str] = None
+    ssh_username: Optional[str] = None
+    ssh_private_key_path: Optional[str] = None
+    ssh_tasks_dir: Optional[str] = None
+    ssh_jobs_dir: Optional[str] = None