audit notes work completed, test fixes work (95% done), new sprints, new data sources setup and configuration

src/__Libraries/StellaOps.Doctor.Plugins.Sources/SourcesPlugin.cs

@@ -0,0 +1,78 @@
+// -----------------------------------------------------------------------------
+// SourcesPlugin.cs
+// Sprint: SPRINT_20260114_SOURCES_SETUP
+// Task: 12.1 - Sources Doctor Plugin
+// Description: Doctor plugin providing advisory source connectivity diagnostics
+// -----------------------------------------------------------------------------
+
+using Microsoft.Extensions.DependencyInjection;
+using StellaOps.Concelier.Core.Sources;
+using StellaOps.Doctor.Models;
+using StellaOps.Doctor.Plugins;
+using StellaOps.Doctor.Plugins.Sources.Checks;
+
+namespace StellaOps.Doctor.Plugins.Sources;
+
+/// <summary>
+/// Doctor plugin for advisory data source diagnostics.
+/// Provides connectivity checks for all configured CVE/advisory data sources.
+/// </summary>
+public sealed class SourcesPlugin : IDoctorPlugin
+{
+    /// <inheritdoc />
+    public string PluginId => "stellaops.doctor.sources";
+
+    /// <inheritdoc />
+    public string DisplayName => "Advisory Sources";
+
+    /// <inheritdoc />
+    public DoctorCategory Category => DoctorCategory.Data;
+
+    /// <inheritdoc />
+    public Version Version => new(1, 0, 0);
+
+    /// <inheritdoc />
+    public Version MinEngineVersion => new(1, 0, 0);
+
+    /// <inheritdoc />
+    public bool IsAvailable(IServiceProvider services)
+    {
+        // Plugin is available if ISourceRegistry is registered
+        return services.GetService<ISourceRegistry>() is not null;
+    }
+
+    /// <inheritdoc />
+    public IReadOnlyList<IDoctorCheck> GetChecks(DoctorPluginContext context)
+    {
+        var registry = context.Services.GetService<ISourceRegistry>();
+        if (registry is null)
+        {
+            return [];
+        }
+
+        var checks = new List<IDoctorCheck>
+        {
+            // Overall source mode configuration check
+            new SourceModeConfiguredCheck(),
+
+            // Mirror server checks
+            new MirrorServerAuthCheck(),
+            new MirrorServerRateLimitCheck()
+        };
+
+        // Generate dynamic checks for each registered source
+        foreach (var source in registry.GetAllSources())
+        {
+            checks.Add(new SourceConnectivityCheck(source.Id, source.DisplayName));
+        }
+
+        return checks;
+    }
+
+    /// <inheritdoc />
+    public Task InitializeAsync(DoctorPluginContext context, CancellationToken ct)
+    {
+        // No initialization required
+        return Task.CompletedTask;
+    }
+}