feat(central-ui): Retry/Discard a parked outbound node from the Flow Debugger with scope check, confirm and re-poll

The page wires FlowStepDetail's OnRetry/OnDiscard to IFlowDebugService.RetryOutboundAsync /
DiscardOutboundAsync behind the same site-scope re-check and confirm wording the Site Calls /
Notification report pages use, toasts the relay outcome, and on success re-polls Replay (same
5 s / 2 min loop) until the acted node leaves Parked. Also drops a duplicated ?correlationId=
test block that a concurrent index-only commit left in QueryStringDrillInTests.

Claude-Session: https://claude.ai/code/session_01NcMG6xXdsJbmD2wYAgkK29

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Deployment/FlowDebugger.razor

@@ -9,6 +9,7 @@
 
 <div class="container-fluid mt-3">
     <h4 class="mb-3">Flow Debugger</h4>
+    <ToastNotification @ref="_toast" />
 
     @* ── Toolbar ─────────────────────────────────────────────────────────── *@
     <div class="row g-2 align-items-end mb-2" data-test="flow-toolbar">
@@ -233,7 +234,8 @@
         <div class="col-12">
             <FlowStepDetail Step="_selected" Graph="_graph"
                             SiteDbId="@(_entry == EntryKind.ValueChange && _selectedSiteId > 0 ? _selectedSiteId : null)"
-                            InstanceDbId="@(_entry == EntryKind.ValueChange && _selectedInstanceId > 0 ? _selectedInstanceId : null)" />
+                            InstanceDbId="@(_entry == EntryKind.ValueChange && _selectedInstanceId > 0 ? _selectedInstanceId : null)"
+                            OnRetry="OnRetryStepAsync" OnDiscard="OnDiscardStepAsync" ActionInProgress="_actionInProgress" />
         </div>
     </div>
 </div>