AxoIncidentBar: perf, ranking-accuracy, and sender-identification fixes

[PTKu]

Summary

• AxoCauseAnalyzer ranking fixes — severity-tier sort is now the outermost key (a Critical candidate is never ranked below an Error one regardless of burst/ownership/age bonuses); age contribution capped at 7 days so uninitialized RisenUtc cannot dominate the score; BurstWindow cutoff clamped against DateTime underflow; candidates with empty DisplayMessage excluded.
• AxoIncidentBarView perf and diagnostics — polling cadence driven by _analyzer.ActiveCount instead of Provider.ActiveMessagesCount (authoritative in all topologies); Tick() always reads state first then conditionally pulls details when any messenger is non-Idle; Serilog (Information / Debug / Warning / Error) replaces the silent catch { }.
• Sender identification — SenderDisplayName becomes a top-down AttributeName breadcrumb (e.g. Station › Drive › Encoder); new IRankableMessage.SenderSymbol carries the full PLC symbol path (rendered as a mono subtitle + title tooltip on the bar). AxoMessengerRankableAdapter defaults SenderSymbol to the messenger symbol so existing call sites compile unchanged.
• Provider read-path tweaks — ReadMessageStateAsync now batches Risen / Fallen / Acknowledged alongside the state triple; ReadDetails issues its batch at eAccessPriority.Low to reduce contention with operator-driven traffic.
• Documentation — src/core/docs/AxoIncidentBar.md ranking section updated with severity-tier-outermost note, Station/Drive example rewritten to match the new sort order, BLAZOR tab gains a Sender-identification subsection; src/core/docs/CHANGELOG.md 0.56.1 entry appended; central CHANGELOG.md entry added.

Test plan

• dotnet test src/core/tests/AXOpen.Core.Tests/Messaging/ — AxoCauseAnalyzerTests, AxoIncidentBarPresenterTests, AxoMessengerRankableAdapterTests all green.
• dotnet build src/core/src/AXOpen.Core.Blazor/ — Razor compiles clean with the new Serilog using and IRankableMessage.SenderSymbol references.
• Manual: run the showcase, navigate to /core/AxoIncidentBar, trigger the Station / Drive / Encoder + Conveyor / Sensor topology and confirm:
  • Critical alarm always sits on top regardless of which level is firing.
  • Bar shows the breadcrumb sender (e.g. Station › Drive › Encoder).
  • Hovering the sender label surfaces the full PLC symbol path tooltip; the mono subtitle renders the same path below the breadcrumb.
  • Bar polling drops to ~2500 ms when no Error+ is active and ~750 ms while at least one is firing.
• Manual: trigger an active messenger with MessageCode == 0 and confirm it is excluded from the bar candidates (still counted by global indicators).
• Manual: verify Serilog output shows ConfigurePolling done. Messengers discovered: N on bar mount and Tick: ActiveCount=… TopCause=… per cycle.

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