Add support for auto-deleting trashed items

Upstream will soon auto-delete trashed items after 30 days, but some people
use the trash as an archive folder, so to avoid unexpected data loss, this
implementation requires the user to explicitly enable auto-deletion.

src/main.rs

@@ -354,6 +354,13 @@ fn schedule_jobs(pool: db::DbPool) {
             }));
         }
 
+        // Purge trashed items that are old enough to be auto-deleted.
+        if !CONFIG.trash_purge_schedule().is_empty() {
+            sched.add(Job::new(CONFIG.trash_purge_schedule().parse().unwrap(), || {
+                api::purge_trashed_ciphers(pool.clone());
+            }));
+        }
+
         // Periodically check for jobs to run. We probably won't need any
         // jobs that run more often than once a minute, so a default poll
         // interval of 30 seconds should be sufficient. Users who want to