add docstrings

add documentation tags

add some error handling

src/vmr_http/models/bus.py

@@ -0,0 +1,14 @@
+"""Models for the parameters of a bus."""
+
+from typing import Optional
+
+from pydantic import BaseModel
+
+
+class BusParams(BaseModel):
+    """Parameters for a single bus."""
+
+    gain: Optional[float] = None
+    mute: Optional[bool] = None
+    mono: Optional[int] = None
+    eq: Optional[bool] = None