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.HealthMonitoring/HealthMonitoringOptionsValidator.cs

@@ -16,11 +16,7 @@ namespace ZB.MOM.WW.ScadaBridge.HealthMonitoring;
 /// </summary>
 public sealed class HealthMonitoringOptionsValidator : OptionsValidatorBase<HealthMonitoringOptions>
 {
-    /// <summary>
-    /// Validates the health monitoring options, recording a failure if any interval values are non-positive.
-    /// </summary>
-    /// <param name="builder">The accumulator to record failures on.</param>
-    /// <param name="options">The health monitoring options to validate.</param>
+    /// <inheritdoc />
     protected override void Validate(ValidationBuilder builder, HealthMonitoringOptions options)
     {
         builder.RequireThat(options.ReportInterval > TimeSpan.Zero,