add: temporary CORS headers

add: better sql calls with JOIN

include/models/relay.h

@@ -48,6 +48,9 @@ relay_get_by_id(int id);
 relay_t*
 relay_get_for_controller(int controller_id, int relay_num);
 
+relay_t**
+relay_get_with_schedule(int schedule_id);
+
 relay_t**
 relay_get_all();
 

include/models/schedule.h

@@ -52,6 +52,9 @@ schedule_get_by_uid_or_off(uuid_t uid);
 schedule_t*
 schedule_get_by_uid(uuid_t uid);
 
+schedule_t**
+schedule_get_relay_weekdays(int relay_id);
+
 schedule_t**
 schedule_get_all();