adding static connection

app/models/__init__.py

@@ -9,6 +9,7 @@ from app.models.manufacturer import Manufacturer
 from app.models.part_type import PartType
 from app.models.permission import Permission
 from app.models.scope_model import ScopeModel
+from app.models.static_connection import StaticConnection
 from app.models.sub_part_type import SubPartType
 from app.models.refresh_token import RefreshToken
 from app.models.role import Role
@@ -24,6 +25,7 @@ __all__ = [
     "PartType",
     "Permission",
     "ScopeModel",
+    "StaticConnection",
     "SubPartType",
     "RefreshToken",
     "Role",

app/models/static_connection.py

@@ -0,0 +1,13 @@
+from sqlalchemy import Float, UniqueConstraint
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.core.database import Base
+
+
+class StaticConnection(Base):
+    __tablename__ = "static_connections"
+    __table_args__ = (UniqueConstraint("od_mm"),)
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    od_mm: Mapped[float] = mapped_column(Float, nullable=False)
+    od_in: Mapped[float] = mapped_column(Float, nullable=False)