Add clamp connection

app/schemas/clamp_connection.py

@@ -0,0 +1,21 @@
+from pydantic import BaseModel, ConfigDict
+
+
+class ClampConnectionBase(BaseModel):
+    min_mm: float | None = None
+    max_mm: float | None = None
+    min_in: float | None = None
+    max_in: float | None = None
+
+
+class ClampConnectionCreate(ClampConnectionBase):
+    pass
+
+
+class ClampConnectionUpdate(ClampConnectionBase):
+    pass
+
+
+class ClampConnectionRead(ClampConnectionBase):
+    model_config = ConfigDict(from_attributes=True)
+    id: int