Apply suggestions from code review

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

Author: jongalloway

DotNetMcp/DotNetCliTools.cs

@@ -14,7 +14,8 @@ public sealed class DotNetCliTools
 
     public DotNetCliTools(ILogger<DotNetCliTools> logger)
     {
-        _logger = logger;
+        // DI guarantees logger is never null
+        _logger = logger!;
     }
     [McpServerTool, Description("List all installed .NET templates with their metadata using the Template Engine. Provides structured information about available project templates.")]
     public async Task<string> DotnetTemplateList()

DotNetMcp/TemplateEngineHelper.cs

@@ -40,7 +40,7 @@ private static async Task<IEnumerable<ITemplateInfo>> GetTemplatesCachedAsync(IL
         {
             if (_templatesCache == null || DateTime.UtcNow > _cacheExpiry)
             {
-                logger?.LogDebug("Template cache miss - loading templates from Template Engine");
+                logger?.LogDebug("Template cache miss - loading templates from template engine");
                 var engineEnvironmentSettings = new EngineEnvironmentSettings(
                     new DefaultTemplateEngineHost("dotnet-mcp", "1.0.0"),
                     virtualizeSettings: true);