Suppress execution context from token renewal (#2782)

* Suppress execution context from token renewal

* update release_notes.md

Author: jviau

release_notes.md

@@ -23,6 +23,8 @@
 
 ### Bug Fixes
 
+- Fix execution context / log scope leak in token renewal (https://github.com/Azure/azure-functions-durable-extension/pull/2782)
+
 ### Breaking Changes
 
 ### Dependency Updates

src/WebJobs.Extensions.DurableTask/Auth/AzureCredentialFactory.cs

@@ -72,6 +72,10 @@ public AppAuthTokenCredential Create(IConfiguration configuration, TimeSpan toke
                 RefreshOffset = tokenRefreshOffset,
             };
 
+            // The token credential will make background callbacks to renew the token.
+            // We suppress async flow to avoid logging scope from being captured as we do not know
+            // where this will be called from first.
+            using AsyncFlowControl flowControl = System.Threading.ExecutionContext.SuppressFlow();
             return new AppAuthTokenCredential(
                 value.Token,
                 (o, t) => this.RenewTokenAsync((TokenRenewalState)o, t),