refactor(automations): vertical-slice actions and triggers by domain

surfsense_backend/app/automations/registries/triggers/schedule.py

@@ -1,21 +0,0 @@
-"""Built-in ``schedule`` trigger. Self-registers at import time."""
-
-from __future__ import annotations
-
-from app.automations.schemas.triggers import ScheduleTriggerParams
-
-from .store import register_trigger
-from .types import TriggerDefinition
-
-SCHEDULE_TRIGGER = TriggerDefinition(
-    type="schedule",
-    description="Fire on a cron schedule in a given timezone.",
-    params_schema=ScheduleTriggerParams.model_json_schema(),
-    payload_schema={
-        "type": "object",
-        "additionalProperties": False,
-        "properties": {},
-    },
-)
-
-register_trigger(SCHEDULE_TRIGGER)