feat: the trigger can ignore a noise band and reject HF before comparing

src/search.hpp

@@ -48,7 +48,7 @@ class BufferSearch {
   };
 
   /// Begins a scan of the channel for the condition. Discards any previous result.
-  void start(const EventCondition& c, int channel);
+  void start(const EventCondition& c, int channel, double dt);
   void cancel() noexcept;
   void clear() noexcept;