docs(localdb): Phase 1 truth pass

Task 13.

SiteEventLogger's XML doc said 'Not replicated to standby. On failover, the new
active node starts a fresh log.' That is now false and was the exact behaviour
Phase 1 set out to fix.

OperationTrackingOptions.ConnectionString and SiteEventLogOptions.DatabasePath
marked MIGRATION-ONLY: nothing reads them but SiteLocalDbLegacyMigrator, and
they are safe to delete from a config once a node has migrated.

ScadaBridge CLAUDE.md gains a consolidated-site-database entry covering the
GUID/opaque-token contract change, the migration-only keys, the incidental
CWD-outside-the-volume data-loss fix, the fail-closed default-OFF replication
posture, and the fact that ZbTelemetryOptions.Meters is a silent allowlist.

scadaproj CLAUDE.md's LocalDb row goes from 'no app adoption yet' to the honest
current state, per the component-status-honesty convention: ScadaBridge Phase 1
only, on an UNMERGED branch, replication live-proven on the rig's site-a pair
ONLY, default-OFF everywhere else, Phase 2 not started, no other app adopted, no
production deployment replicating.

Claude-Session: https://claude.ai/code/session_01BL2Vu1ESDQ9SCN4gVKkdts

src/ZB.MOM.WW.ScadaBridge.SiteEventLogging/SiteEventLogOptions.cs

@@ -6,7 +6,14 @@ public class SiteEventLogOptions
     public int RetentionDays { get; set; } = 30;
     /// <summary>Maximum SQLite database size in megabytes before old entries are purged; default 1024 MB.</summary>
     public int MaxStorageMb { get; set; } = 1024;
-    /// <summary>File path for the site event log SQLite database.</summary>
+    /// <summary>
+    /// MIGRATION-ONLY as of LocalDb Phase 1. <see cref="SiteEventLogger"/> no longer reads
+    /// this: <c>site_events</c> lives in the consolidated site database at
+    /// <c>LocalDb:Path</c>. The only remaining consumer is
+    /// <c>SiteLocalDbLegacyMigrator</c>, which uses it to locate a pre-Phase-1
+    /// <c>site_events.db</c> and copy it in once. Safe to delete from a config once that
+    /// node's migration has run.
+    /// </summary>
     public string DatabasePath { get; set; } = "site_events.db";
     /// <summary>Maximum number of rows returned per paginated query; default 500.</summary>
     public int QueryPageSize { get; set; } = 500;