Avoid linear searches for excluded events (#85851)

If the there are a lot of excluded events for the recorder, it
can have a performance impact as the list has to be searched
every time an event fires in HA

homeassistant/components/recorder/core.py

@@ -186,7 +186,7 @@ class Recorder(threading.Thread):
         self.run_history = RunHistory()
 
         self.entity_filter = entity_filter
-        self.exclude_t = exclude_t
+        self.exclude_t = set(exclude_t)
 
         self.schema_version = 0
         self._commits_without_expire = 0