Return Service errors

Additionally, removed the context that gets passed into the Services but isn't used in one of them. The websockets APIs also don't have any use for context.

internal/services/zwavejs.go

@@ -1,8 +1,6 @@
 package services
 
 import (
-	"context"
-
 	ws "saml.dev/gome-assistant/internal/websocket"
 )
 
@@ -10,13 +8,12 @@ import (
 
 type ZWaveJS struct {
 	conn *ws.WebsocketWriter
-	ctx  context.Context
 }
 
 /* Public API */
 
 // ZWaveJS bulk_set_partial_config_parameters service.
-func (zw ZWaveJS) BulkSetPartialConfigParam(entityId string, parameter int, value any) {
+func (zw ZWaveJS) BulkSetPartialConfigParam(entityId string, parameter int, value any) error {
 	req := NewBaseServiceRequest(entityId)
 	req.Domain = "zwave_js"
 	req.Service = "bulk_set_partial_config_parameters"
@@ -25,5 +22,5 @@ func (zw ZWaveJS) BulkSetPartialConfigParam(entityId string, parameter int, valu
 		"value":     value,
 	}
 
-	zw.conn.WriteMessage(req, zw.ctx)
+	return zw.conn.WriteMessage(req)
 }