docs: demonstrate UnsafeEntityLogging in todoapp-tutorial server walkthrough (#476)

[adrianhall]

Summary

v10.1.0 added the UnsafeEntityLogging option to TableControllerOptions (#446). samples/todoapp-tutorial is the main walkthrough referenced from docs/tutorial/client/part-1.md and part-2.md ([todoapp]), so this updates it to demonstrate the option by enabling sensitive entity logging, following the same pattern already used in the todoapp-mvc sample (#480 / #485, which demonstrated the secure false default).

Changes

• samples/todoapp-tutorial/ServerApp/ServerApp.csproj: bump CommunityToolkit.Datasync.Server and CommunityToolkit.Datasync.Server.InMemory from 10.0.0 to 10.1.0 so the sample builds against the release that introduced UnsafeEntityLogging.
• samples/todoapp-tutorial/ServerApp/Controllers/TodoItemController.cs: replace the primary-constructor controller with an explicit constructor that wires an ILogger<TodoItemController> and sets Options = new TableControllerOptions { UnsafeEntityLogging = true }, with a comment explaining the security implication (entity contents may contain PII, secrets, or other sensitive business data; only enable when the log sink is secured).

Acceptance criteria

• samples/todoapp-tutorial/ServerApp enables UnsafeEntityLogging = true and wires an ILogger.
• A code comment explains the security implication of enabling the option.
• The sample builds against v10.1.0.

Verification

• dotnet restore + dotnet build on samples/todoapp-tutorial/ServerApp/ServerApp.csproj — succeeded, 0 warnings/errors.
• dotnet restore/dotnet build on Datasync.Toolkit.sln — succeeded (pre-existing, unrelated NU1903 advisories only; the sample is not part of this solution and is unaffected).

Closes #476