Fix: Kafka replication factor hardcoded to 1 and No health check endpoints

VigilCareClinicalAPI/Infrastructure/KafkaHealthCheck.cs

@@ -0,0 +1,25 @@
+using Confluent.Kafka;
+using Microsoft.Extensions.Diagnostics.HealthChecks;
+using Microsoft.Extensions.Options;
+
+public sealed class KafkaHealthCheck : IHealthCheck
+{
+    private readonly KafkaOptions _options;
+
+    public KafkaHealthCheck(IOptions<KafkaOptions> options) => _options = options.Value;
+
+    public async Task<HealthCheckResult> CheckHealthAsync(
+        HealthCheckContext context, CancellationToken cancellationToken = default)
+    {
+        using var admin = new AdminClientBuilder(new AdminClientConfig
+        {
+            BootstrapServers = _options.BootstrapServers
+        }).Build();
+
+        var metadata = await Task.Run(
+            () => admin.GetMetadata(TimeSpan.FromSeconds(5)), cancellationToken);
+
+        var data = new Dictionary<string, object> { ["brokers"] = metadata.Brokers.Count };
+        return HealthCheckResult.Healthy(data: data);
+    }
+}