Implement in-process multi-dataset sync isolation across core, network, persistence, and tests

samples/ZB.MOM.WW.CBDDC.Sample.Console/TelemetryData.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace ZB.MOM.WW.CBDDC.Sample.Console;
+
+/// <summary>
+///     Append-only telemetry log entry used for high-volume sync scenarios.
+/// </summary>
+public class TelemetryLogEntry
+{
+    /// <summary>
+    ///     Gets or sets the unique log identifier.
+    /// </summary>
+    [Key]
+    public string Id { get; set; } = Guid.NewGuid().ToString("N");
+
+    /// <summary>
+    ///     Gets or sets the log level.
+    /// </summary>
+    public string Level { get; set; } = "Information";
+
+    /// <summary>
+    ///     Gets or sets the log message.
+    /// </summary>
+    public string Message { get; set; } = string.Empty;
+
+    /// <summary>
+    ///     Gets or sets the UTC timestamp.
+    /// </summary>
+    public DateTime CreatedUtc { get; set; } = DateTime.UtcNow;
+}
+
+/// <summary>
+///     Append-only timeseries metric point used for telemetry sync scenarios.
+/// </summary>
+public class TimeseriesPoint
+{
+    /// <summary>
+    ///     Gets or sets the unique metric point identifier.
+    /// </summary>
+    [Key]
+    public string Id { get; set; } = Guid.NewGuid().ToString("N");
+
+    /// <summary>
+    ///     Gets or sets the metric name.
+    /// </summary>
+    public string Metric { get; set; } = "cpu";
+
+    /// <summary>
+    ///     Gets or sets the metric value.
+    /// </summary>
+    public double Value { get; set; }
+
+    /// <summary>
+    ///     Gets or sets the UTC timestamp.
+    /// </summary>
+    public DateTime RecordedUtc { get; set; } = DateTime.UtcNow;
+}