audit work, fixed StellaOps.sln warnings/errors, fixed tests, sprints work, new advisories

src/Timeline/StellaOps.Timeline.WebService/Endpoints/HealthEndpoints.cs

@@ -0,0 +1,62 @@
+// Copyright (c) StellaOps. Licensed under the AGPL-3.0-or-later.
+
+using Microsoft.Extensions.Diagnostics.HealthChecks;
+using StellaOps.Eventing.Storage;
+
+namespace StellaOps.Timeline.WebService.Endpoints;
+
+/// <summary>
+/// Health check endpoints.
+/// </summary>
+public static class HealthEndpoints
+{
+    /// <summary>
+    /// Maps health check endpoints.
+    /// </summary>
+    public static void MapHealthEndpoints(this IEndpointRouteBuilder app)
+    {
+        app.MapHealthChecks("/health");
+        app.MapHealthChecks("/health/ready", new Microsoft.AspNetCore.Diagnostics.HealthChecks.HealthCheckOptions
+        {
+            Predicate = check => check.Tags.Contains("ready")
+        });
+        app.MapHealthChecks("/health/live", new Microsoft.AspNetCore.Diagnostics.HealthChecks.HealthCheckOptions
+        {
+            Predicate = check => check.Tags.Contains("live")
+        });
+    }
+}
+
+/// <summary>
+/// Health check for timeline service.
+/// </summary>
+public sealed class TimelineHealthCheck : IHealthCheck
+{
+    private readonly ITimelineEventStore _eventStore;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="TimelineHealthCheck"/> class.
+    /// </summary>
+    public TimelineHealthCheck(ITimelineEventStore eventStore)
+    {
+        _eventStore = eventStore;
+    }
+
+    /// <inheritdoc/>
+    public async Task<HealthCheckResult> CheckHealthAsync(
+        HealthCheckContext context,
+        CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            // Simple check - try to count events for a nonexistent correlation
+            // This validates database connectivity
+            await _eventStore.CountByCorrelationIdAsync("__health_check__", cancellationToken);
+            return HealthCheckResult.Healthy("Timeline service is healthy");
+        }
+        catch (Exception ex)
+        {
+            return HealthCheckResult.Unhealthy("Timeline service is unhealthy", ex);
+        }
+    }
+}