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/Core/ZB.MOM.WW.OtOpcUa.Core.Abstractions/Historian/IHistorianDataSource.cs

@@ -23,6 +23,11 @@ public interface IHistorianDataSource : IDisposable
     /// <summary>
     ///     Read raw historical samples for a single tag over a time range.
     /// </summary>
+    /// <param name="fullReference">The full reference of the tag to read.</param>
+    /// <param name="startUtc">The start of the time range in UTC.</param>
+    /// <param name="endUtc">The end of the time range in UTC.</param>
+    /// <param name="maxValuesPerNode">The maximum number of values to return per node.</param>
+    /// <param name="cancellationToken">A cancellation token that can be used to cancel the operation.</param>
     Task<HistoryReadResult> ReadRawAsync(
         string fullReference,
         DateTime startUtc,
@@ -35,6 +40,12 @@ public interface IHistorianDataSource : IDisposable
     ///     A bucket with no source data returns a sample whose
     ///     <see cref="DataValueSnapshot.StatusCode"/> indicates BadNoData.
     /// </summary>
+    /// <param name="fullReference">The full reference of the tag to read.</param>
+    /// <param name="startUtc">The start of the time range in UTC.</param>
+    /// <param name="endUtc">The end of the time range in UTC.</param>
+    /// <param name="interval">The interval for bucketing samples.</param>
+    /// <param name="aggregate">The aggregation function to apply to each bucket.</param>
+    /// <param name="cancellationToken">A cancellation token that can be used to cancel the operation.</param>
     Task<HistoryReadResult> ReadProcessedAsync(
         string fullReference,
         DateTime startUtc,
@@ -49,6 +60,9 @@ public interface IHistorianDataSource : IDisposable
     ///     backend's policy. The returned list MUST be the same length and order as
     ///     <paramref name="timestampsUtc"/>; gaps are returned as Bad-quality snapshots.
     /// </summary>
+    /// <param name="fullReference">The full reference of the tag to read.</param>
+    /// <param name="timestampsUtc">The list of timestamps to read values at.</param>
+    /// <param name="cancellationToken">A cancellation token that can be used to cancel the operation.</param>
     Task<HistoryReadResult> ReadAtTimeAsync(
         string fullReference,
         IReadOnlyList<DateTime> timestampsUtc,
@@ -74,6 +88,11 @@ public interface IHistorianDataSource : IDisposable
     ///     methods so legacy drivers can stay raw-only. The asymmetry is intentional
     ///     (Core.Abstractions-008).
     /// </remarks>
+    /// <param name="sourceName">The source name to filter events, or null to return events from all sources.</param>
+    /// <param name="startUtc">The start of the time range in UTC.</param>
+    /// <param name="endUtc">The end of the time range in UTC.</param>
+    /// <param name="maxEvents">The maximum number of events to return, or a non-positive value to use the default backend cap.</param>
+    /// <param name="cancellationToken">A cancellation token that can be used to cancel the operation.</param>
     Task<HistoricalEventsResult> ReadEventsAsync(
         string? sourceName,
         DateTime startUtc,