Update ITrace documentation to note thread safety

Co-authored-by: sourabh1007 <[email protected]>

Author: Copilot

Microsoft.Azure.Cosmos/src/Tracing/ITrace.cs

@@ -90,20 +90,23 @@ ITrace StartChild(
 
         /// <summary>
         /// Adds a datum to the this trace instance.
+        /// This method is thread-safe.
         /// </summary>
         /// <param name="key">The key to associate the datum.</param>
         /// <param name="traceDatum">The datum itself.</param>
         void AddDatum(string key, TraceDatum traceDatum);
 
         /// <summary>
         /// Adds a datum to the this trace instance.
+        /// This method is thread-safe.
         /// </summary>
         /// <param name="key">The key to associate the datum.</param>
         /// <param name="value">The datum itself.</param>
         void AddDatum(string key, object value);
 
         /// <summary>
         /// Updates the given datum in this trace instance if exists, otherwise Add
+        /// This method is thread-safe.
         /// </summary>
         /// <param name="key">The key to associate the datum.</param>
         /// <param name="value">The datum itself.</param>