feat: add database and LDAP health checks with JSON response formatting

Implement health checks for SQL Server, Oracle databases (JDE, CMS, GIW), and LDAP servers to enable comprehensive system monitoring via the /health endpoint.

NEW/src/JdeScoping.Api/DependencyInjection.cs

@@ -7,6 +7,7 @@ using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Diagnostics.HealthChecks;
 using Microsoft.Extensions.Hosting;
 using Microsoft.AspNetCore.Diagnostics.HealthChecks;
 using Microsoft.OpenApi.Models;
@@ -117,9 +118,35 @@ public static class ApiDependencyInjection
         // Health check endpoint - no authentication required
         app.MapHealthChecks("/health", new HealthCheckOptions
         {
-            AllowCachingResponses = false
+            AllowCachingResponses = false,
+            ResponseWriter = WriteHealthCheckResponse
         }).AllowAnonymous();
 
         return app;
     }
+
+    /// <summary>
+    /// Writes detailed JSON response for health check results.
+    /// </summary>
+    private static async Task WriteHealthCheckResponse(HttpContext context, HealthReport report)
+    {
+        context.Response.ContentType = "application/json";
+
+        var result = new
+        {
+            status = report.Status.ToString(),
+            totalDuration = report.TotalDuration.TotalMilliseconds,
+            checks = report.Entries.Select(e => new
+            {
+                name = e.Key,
+                status = e.Value.Status.ToString(),
+                description = e.Value.Description,
+                duration = e.Value.Duration.TotalMilliseconds,
+                data = e.Value.Data,
+                exception = e.Value.Exception?.Message
+            })
+        };
+
+        await context.Response.WriteAsJsonAsync(result);
+    }
 }