Bind complete Drop flows to the TUnit test lifetime

The shared Drop flow applied a single 130-second restart-completion window to seeding, execution and two cold reopens. A healthy Debug run exceeded that window, so the second restart received an already-cancelled token.

Pass the existing TUnit lifetime token through the complete operation. Retain the existing per-host startup/shutdown cancellation bounds, joined cleanup, exact original receipts, healthy follow-up and both cold reopens. Explicit caller cancellation and committed-reply failure checks remain unchanged.

Validation: all three focused Drop flows passed without skips; the original lifecycle completed in 152 seconds. Full strict Debug solution build, format verification, governance, four compiled-inventory controls and canonical 3290-case census plus all five selectors passed. Full exact-source local and Linux qualification remain pending.

Author: KSemenenko

tests/KeyLoad.FunctionalTests/ResourceExecution/Scenarios/Tables/RuntimeDrop/DropOperationFlow.cs

@@ -13,11 +13,9 @@ internal static async Task RunAsync(Func<DropRuntimeProfile, CancellationToken,
         await ServerFailureObserver.ObserveAsync(async () =>
         {
             profile = await DropRuntimeProfile.CreateAsync(token, limits).ConfigureAwait(false);
-            using var deadline = new CancellationTokenSource(profile.Node.Timing.RestartCompletionTimeout, TimeProvider.System);
-            using var lifetime = CancellationTokenSource.CreateLinkedTokenSource(token, deadline.Token);
-            await DropRuntimeSeed.CreateAsync(profile, lifetime.Token).ConfigureAwait(false);
-            await DropRuntimeSeed.CreateAsync(profile, lifetime.Token, DropRuntimeProtocol.OtherTable).ConfigureAwait(false);
-            await operation(profile, lifetime.Token).ConfigureAwait(false);
+            await DropRuntimeSeed.CreateAsync(profile, token).ConfigureAwait(false);
+            await DropRuntimeSeed.CreateAsync(profile, token, DropRuntimeProtocol.OtherTable).ConfigureAwait(false);
+            await operation(profile, token).ConfigureAwait(false);
         }, failures).ConfigureAwait(false);
         if (profile is not null)
         {