docs: backfill XML documentation across 756 files

Adds <summary>, <param>, <typeparam>, and <inheritdoc/> tags to public
members surfaced by commentchecker — resolves 5,847 of 5,869 issues
(99.6%) across three /fixdocs passes.

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.FOCAS/FocasAddress.cs

@@ -19,6 +19,7 @@ public sealed record FocasAddress(
     int Number,
     int? BitIndex)
 {
+    /// <summary>Gets the canonical string representation of this address.</summary>
     public string Canonical => Kind switch
     {
         FocasAreaKind.Pmc => BitIndex is null
@@ -31,6 +32,9 @@ public sealed record FocasAddress(
         _ => $"?{Number}",
     };
 
+    /// <summary>Attempts to parse a FOCAS address from the given string.</summary>
+    /// <param name="value">The address string to parse.</param>
+    /// <returns>A FocasAddress if parsing succeeds; otherwise null.</returns>
     public static FocasAddress? TryParse(string? value)
     {
         if (string.IsNullOrWhiteSpace(value)) return null;