Added logging.

JSMR.Api/Program.cs

@@ -7,6 +7,9 @@ using JSMR.Infrastructure.Data;
 using JSMR.Infrastructure.DI;
 using Microsoft.AspNetCore.Http.Json;
 using Microsoft.EntityFrameworkCore;
+using Serilog;
+using Serilog.Events;
+using System.Diagnostics;
 using System.Text.Json;
 using System.Text.Json.Serialization;
 
@@ -37,6 +40,15 @@ builder.Services.Configure<JsonOptions>(options =>
         new JsonStringEnumConverter(JsonNamingPolicy.CamelCase)); // or null for exact names
 });
 
+// Serilog bootstrap (before Build)
+Log.Logger = new LoggerConfiguration()
+    .ReadFrom.Configuration(builder.Configuration)
+    .MinimumLevel.Override("Microsoft", LogEventLevel.Warning)
+    .Enrich.WithProperty("Service", "JSMR.Api")
+    .Enrich.WithProperty("Environment", builder.Environment.EnvironmentName)
+    .CreateLogger();
+builder.Host.UseSerilog();
+
 var app = builder.Build();
 
 // Configure the HTTP request pipeline.
@@ -51,6 +63,25 @@ app.UseAuthorization();
 
 app.MapControllers();
 
+// Request logging with latency, status, path
+app.UseSerilogRequestLogging(opts =>
+{
+    opts.MessageTemplate = "HTTP {RequestMethod} {RequestPath} responded {StatusCode} in {Elapsed:0.0000} ms";
+});
+
+// Correlation: ensure every log has traceId and return it to clients
+app.Use(async (ctx, next) =>
+{
+    // Use current Activity if present (W3C trace context), else fall back
+    var traceId = Activity.Current?.TraceId.ToString() ?? ctx.TraceIdentifier;
+    using (Serilog.Context.LogContext.PushProperty("TraceId", traceId))
+    {
+        ctx.Response.Headers["x-trace-id"] = traceId;
+        await next();
+    }
+});
+
+
 // Health check
 app.MapGet("/health", () => Results.Ok(new { status = "ok" }));
 
@@ -62,9 +93,16 @@ app.MapPost("/api/circles/search", async (
     SearchCirclesHandler handler,
     CancellationToken cancallationToken) =>
 {
-    var result = await handler.HandleAsync(request, cancallationToken);
+    try
+    {
+        SearchCirclesResponse result = await handler.HandleAsync(request, cancallationToken);
 
-    return Results.Ok(result);
+        return Results.Ok(result);
+    }
+    catch (OperationCanceledException) when (cancallationToken.IsCancellationRequested)
+    {
+        return Results.StatusCode(StatusCodes.Status499ClientClosedRequest);
+    }
 });
 
 // Voice Works Search