Rename time_pattern trigger to hourly_timer

Renamed the shared time_pattern trigger from "periodic_summary" to
"hourly_timer" since it serves both periodic summary and scheduled
assets features. This makes the trigger's purpose clearer.

Updated all references in should_send_periodic_summary,
should_send_scheduled_assets, and the condition block.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

manifest.json

@@ -1,3 +1,3 @@
 {
-  "version": "1.22.8"
+  "version": "1.22.9"
 }