refactor(channels): resolve progress overrides at init-time like transcription

nanobot/channels/base.py

@@ -26,6 +26,8 @@ class BaseChannel(ABC):
     transcription_api_key: str = ""
     transcription_api_base: str = ""
     transcription_language: str | None = None
+    send_progress: bool = True
+    send_tool_hints: bool = False
 
     def __init__(self, config: Any, bus: MessageBus):
         """