feat(host): build the process logger through the shared AddZbSerilog bootstrap (#94)

Switch ScadaBridge from its own LoggerConfigurationFactory to AddZbSerilog
(ZB.MOM.WW.Telemetry(.Serilog) 0.1.0 -> 0.2.0) using the two 0.2.0 hooks:

- MinimumLevelGovernor: ScadaBridge:Logging:MinimumLevel, applied after
  ReadFrom.Configuration so it outranks Serilog:MinimumLevel (never null, so the
  floor never defers to the Serilog key; Override:* namespace entries still apply;
  the one-shot conflict / unparseable-value warnings are unchanged).
- ConfigureLogger: the standby active-node exclusion filter (register row 71),
  the configured node identity (the shared bootstrap stamps NodeHostname from
  the machine name and skips empty values; an overwriting enricher keeps the
  configured ScadaBridge:Node values verbatim), Enrich.FromLogContext and the
  ExecutionLogCaptureSink.

ScadaBridgeLogging runs AddZbSerilog on a small pre-host builder and Program
installs the result as the static Log.Logger; both web hosts keep UseSerilog()
over it. One logger and one file-sink handle per process, usable before the
host is built (startup banner, warnings, pre-host Fatal), by SerilogAkkaLogger,
and after the host is disposed (shutdown line, unexpected-termination Fatal) —
AddZbSerilog's own DI registration would leave Log.Logger alone and have the
host dispose the logger.

LoggerConfigurationFactory is deleted (nothing else used it). Tests: existing
logging/standby/sink tests now run through the new pipeline, plus
ScadaBridgeLoggingParityTests (level precedence, Override:* still applies,
one-shot warning, configured identity incl. NodeHostname != MachineName and empty
SiteId, exact property set of a plain line, trace_id/span_id). Mutation-checked:
governor deferring, filter removed, identity enricher removed, FromLogContext
removed, capture sink removed each fail tests.

Claude-Session: https://claude.ai/code/session_01GT67ACmpMR7b9LGRPLijMi

src/ZB.MOM.WW.ScadaBridge.Host/Program.cs

@@ -141,15 +141,15 @@ var nodeRole = configuration["ScadaBridge:Node:Role"]!;
 var nodeHostname = configuration["ScadaBridge:Node:NodeHostname"] ?? "unknown";
 var siteId = configuration["ScadaBridge:Node:SiteId"] ?? "central";
 
-// Serilog structured logging.
-// Minimum level is driven by ScadaBridge:Logging:MinimumLevel (LoggingOptions).
-// Console and file sinks are defined in the `Serilog` configuration
-// section (appsettings.json) and applied via ReadFrom.Configuration inside the
-// factory — the sink set, output template, file path and rolling interval are all
-// configuration-driven, not hard-coded here.
-Log.Logger = ZB.MOM.WW.ScadaBridge.Host.LoggerConfigurationFactory
-    .Build(configuration, nodeRole, siteId, nodeHostname)
-    .CreateLogger();
+// Serilog structured logging, built by the family's shared AddZbSerilog bootstrap
+// (ZB.MOM.WW.Telemetry.Serilog, ScadaBridge#94) with ScadaBridge's hooks: minimum level driven by
+// ScadaBridge:Logging:MinimumLevel (LoggingOptions) and the standby active-node filter.
+// Console and file sinks are defined in the `Serilog` configuration section (appsettings.json)
+// and applied via ReadFrom.Configuration — the sink set, output template, file path and rolling
+// interval are all configuration-driven, not hard-coded here. The static logger stays the single
+// process logger (both web hosts call UseSerilog() over it); see ScadaBridgeLogging for why.
+Log.Logger = ZB.MOM.WW.ScadaBridge.Host.ScadaBridgeLogging
+    .CreateLogger(configuration, nodeRole, siteId, nodeHostname);
 
 // The host's ApplicationStopping token, captured once the host is built. A normal Windows service
 // stop (or SIGTERM) cancels it BEFORE RunAsync unwinds, and WindowsServiceLifetime.StopAsync can