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.Communication/Grpc/AlarmShelveStateCodec.cs

@@ -11,9 +11,13 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc;
 public static class AlarmShelveStateCodec
 {
     /// <summary>Returns the wire string for a shelve state (the enum member name).</summary>
+    /// <param name="state">The shelve state to encode as a wire string.</param>
+    /// <returns>The enum member name as a string (e.g., "Unshelved", "OneShotShelved").</returns>
     public static string ToWire(AlarmShelveState state) => state.ToString();
 
     /// <summary>Parses a wire string back to a shelve state; defaults to <see cref="AlarmShelveState.Unshelved"/>.</summary>
+    /// <param name="wire">The wire string to parse; empty or unrecognized values return <see cref="AlarmShelveState.Unshelved"/>.</param>
+    /// <returns>The matching <see cref="AlarmShelveState"/>, or <see cref="AlarmShelveState.Unshelved"/> for unrecognized input.</returns>
     public static AlarmShelveState Parse(string? wire) =>
         Enum.TryParse<AlarmShelveState>(wire, ignoreCase: true, out var state)
             ? state