fix(opcua): scope the deferred-write replay to nodes the apply created (Lane B fix round 2)

N1: a full alarm-state snapshot also sets the condition's Quality, so it now
supersedes an earlier quality-only write for the same id in the deferred
buffer; a quality arriving after the state is kept and replays after it.

N2 / M1: the replay is not inert on a node the apply KEPT - an SDK-applied
Acknowledge/Confirm/Shelve or an optimistic client Write in the window would
be rolled back (with spurious Part 9 events). The replay is now scoped to
nodes the apply created: variables the applier ensured during this apply
(AddressSpaceApplier.BeginRecordingEnsuredVariables) or every variable after a
full rebuild; conditions in the applied composition but not the previous one
(also on a rebuild, which carries a kept condition's state over). Option (b),
a sink that reports whether a live write landed, needs the Commons
DeferredAddressSpaceSink seam outside this lane (follow-up F7).

M2: the benchmark remark now matches its Category=Benchmark trait.
M3: TestHooks and the seam-carrying constructor are internal; PropsForTests
produces the actor through an IIndirectActorProducer.
M4: pinned replay-nothing-and-drop-the-buffer after a failed plan.
M5: PreRestart answers every queued rebuild requester (degraded).

Refs #732
Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT
This commit is contained in:
Joseph Doherty
2026-10-22 15:08:44 -04:00
parent 9496f061af
commit a8284f499e
4 changed files with 400 additions and 26 deletions
@@ -20,7 +20,8 @@ namespace ZB.MOM.WW.OtOpcUa.OpcUaServer.Tests;
/// </list>
/// The wall-clock budgets are generous for CI hardware; the before/after numbers are in the commit
/// message. P3 is pinned by the bookkeeping's own visit counter, which does not depend on the machine.
/// Kept in the default run on purpose (not a Benchmark category the CI filter would have to learn to exclude):
/// Tagged <c>Category=Benchmark</c>, but no filter excludes that category (CI drops only E2E + LiveIntegration),
/// so it runs by default — on purpose:
/// measured after the fix at 5–6 ms (P1) and 58–64 ms (P2) on a loaded dev machine against the 1 s budget —
/// ≥ 15× headroom, so it does not flake on slow CI. The flip side: the pre-fix code (75–150 ms / 470–680 ms) also
/// fits 1 s at these sizes, so the wall-clock legs guard against gross (order-of-magnitude) regressions only; the