Fix unmanaged reconciliation review blockers

Co-authored-by: genichin <4282227+genichin@users.noreply.github.com>

trex_core/application/snapshot_scheduler.py

@@ -44,6 +44,7 @@ class SnapshotScheduler:
         read_port: PortfolioHubReadPort,
         store: SnapshotStore,
         broker: BrokerPort,
+        core_holdings_broker: BrokerPort | None = None,
         schedule_kst: time = time(hour=7, minute=30),
         clock: Callable[[], datetime] | None = None,
         slot_repo=None,
@@ -60,6 +61,7 @@ class SnapshotScheduler:
         self._read = read_port
         self._store = store
         self._broker = broker
+        self._core_holdings_broker = core_holdings_broker or broker
         self._schedule_kst = schedule_kst
         self._clock = clock or (lambda: datetime.now(tz=UTC))
         self._daemon_id: str | None = None
@@ -337,7 +339,7 @@ class SnapshotScheduler:
                     # BAT-050 / REQ-103: pass warn_store for B-case durable warning.
                     reconcile_core_holdings(
                         slot_repo=self._slot_repo, slot_service=self._slot_service,
-                        broker=self._broker, instance_key=self._instance_key,
+                        broker=self._core_holdings_broker, instance_key=self._instance_key,
                         alarm_emitter=self._alarm_emitter,  # dcy-033 / REQ-100
                         warn_store=self._warn_store,  # BAT-050 / REQ-103
                         notification_store=self._notification_store,  # req-0007 / ac-0024