End a locked account's delegation at its date

A delegation with an end date dropped out of the delegate's token then,
but its folder grants stayed until the daily sweep, so the delegate kept
the account as an ordinary share for up to a day. Each node now sleeps
until the soonest end date, woken early by any lock write and at least
hourly, and re-applies that lock under a cluster-wide claim.

The sweep also had a second-run bug: a delegation past its date gave the
delegate back its earlier share, then dropped the note, so the next sweep
removed that share entirely. The note is now kept while the delegate is
still listed.

crates/services/src/lib.rs

@@ -23,6 +23,8 @@ use std::sync::Arc;
 use crate::task_manager::{manager::spawn_task_manager, scheduler::spawn_task_scheduler};
 
 pub mod broadcast;
+// inbuxa: AL-5, delegations end at their date
+pub mod inbuxa_lock_expiry;
 pub mod state_manager;
 pub mod task_manager;
 
@@ -65,6 +67,9 @@ impl SpawnServices for IpcReceivers {
             // Spawn task manager
             spawn_task_manager(inner.clone());
 
+            // inbuxa: AL-5, end delegations at their `until`
+            inbuxa_lock_expiry::spawn_lock_expiry(inner.clone());
+
             // Spawn task scheduler
             spawn_task_scheduler(inner);
         }