docs: complete XML doc comments via fixdocs (2757 to 131 findings)

Add missing <returns>/<param>/<summary>/<typeparam> tags and clean up
misused inheritdoc across 481 files so the documented API surface is
complete. Documentation-only (zero code lines changed). The 131 remaining
findings are inheritdoc-style warnings deliberately left to preserve
hand-written implementation rationale (plan-decision notes, race-condition
explanations).

src/Drivers/Cli/ZB.MOM.WW.OtOpcUa.Driver.Cli.Common/SnapshotFormatter.cs

@@ -23,6 +23,7 @@ public static class SnapshotFormatter
     /// </summary>
     /// <param name="tagName">The tag name to include in the output.</param>
     /// <param name="snapshot">The data value snapshot to format.</param>
+    /// <returns>A multi-line string representation of the tag and its value.</returns>
     public static string Format(string tagName, DataValueSnapshot snapshot)
     {
         ArgumentNullException.ThrowIfNull(snapshot);
@@ -42,6 +43,7 @@ public static class SnapshotFormatter
     /// </summary>
     /// <param name="tagName">The tag name to include in the output.</param>
     /// <param name="result">The write result to format.</param>
+    /// <returns>A single-line string showing the tag name and write status.</returns>
     public static string FormatWrite(string tagName, WriteResult result)
     {
         ArgumentNullException.ThrowIfNull(result);
@@ -54,6 +56,7 @@ public static class SnapshotFormatter
     /// </summary>
     /// <param name="tagNames">The list of tag names to include as rows.</param>
     /// <param name="snapshots">The list of data value snapshots to format.</param>
+    /// <returns>An aligned table string with tag, value, status, and source-time columns.</returns>
     public static string FormatTable(
         IReadOnlyList<string> tagNames, IReadOnlyList<DataValueSnapshot> snapshots)
     {