docs: complete XML doc coverage (returns, summaries, inheritdoc)

Resolve all 622 issues flagged by the enhanced CommentChecker: add missing
<returns> tags (incl. the standard phrasing on non-generic Task methods),
add missing <summary> tags, and replace misused/redundant <inheritdoc/> on
members that override or implement nothing with real documentation.
Documentation-only — no behavior change; solution builds clean.

src/ZB.MOM.WW.ScadaBridge.CentralUI/Services/AuditEventView.cs

@@ -70,6 +70,8 @@ public sealed record AuditEventView
     /// <summary>
     /// Decomposes a canonical <see cref="AuditEvent"/> into a flat view for the UI.
     /// </summary>
+    /// <param name="evt">The canonical audit event to decompose.</param>
+    /// <returns>A flat <see cref="AuditEventView"/> populated from the event's top-level and details fields.</returns>
     public static AuditEventView From(AuditEvent evt)
     {
         var r = AuditRowProjection.Decompose(evt);