fix the eq router. now it works for both strip and bus.

it uses a factory function to create an eq router for each kind.

add models.eq.EQParams. Use it to define on and ab properties.

minor bump

src/vmr_http/models/bus.py

@@ -11,4 +11,3 @@ class BusParams(BaseModel):
     gain: Optional[float] = None
     mute: Optional[bool] = None
     mono: Optional[int] = None
-    eq: Optional[bool] = None