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.AbLegacy.Cli/Commands/ReadCommand.cs

@@ -58,6 +58,7 @@ public sealed class ReadCommand : AbLegacyCommandBase
     /// <summary>Tag-name key the driver uses internally. Address+type is already unique.</summary>
     /// <param name="address">The PCCC file address.</param>
     /// <param name="type">The data type of the address.</param>
+    /// <returns>A combined tag name string in the form <c>address:type</c>.</returns>
     internal static string SynthesiseTagName(string address, AbLegacyDataType type)
         => $"{address}:{type}";
 }