OPC # 0006: Build monitor grid, CI SolutionBuild rows, by-sha endpoint, dashboard SHA badge

ControlPlane.Api/Endpoints/ProjectBuildEndpoints.cs

@@ -1,4 +1,5 @@
 using ControlPlane.Api.Services;
+using ControlPlane.Core.Models;
 using ControlPlane.Core.Services;
 using System.Text.Json;
 
@@ -16,6 +17,7 @@ public static class ProjectBuildEndpoints
         var group = app.MapGroup("/api/builds").WithTags("Builds");
         group.MapGet("/projects",       GetProjects);
         group.MapGet("/history",        GetHistory);
+        group.MapGet("/by-sha",         GetBySha);
         group.MapPost("/{projectName}", TriggerProjectBuild);
         return app;
     }
@@ -27,6 +29,31 @@ public static class ProjectBuildEndpoints
     private static async Task<IResult> GetHistory(BuildHistoryService history) =>
         Results.Ok(await history.GetBuildsAsync());
 
+    /// <summary>
+    /// Returns the latest SolutionBuild record for the given commit SHA, or null if none exists.
+    /// Used by the OPC CommitsTab to render per-commit CI status dots.
+    /// </summary>
+    private static async Task<IResult> GetBySha(string sha, BuildHistoryService history)
+    {
+        if (string.IsNullOrWhiteSpace(sha))
+            return Results.BadRequest("sha is required");
+
+        var builds = await history.GetBuildsByShaAsync(sha);
+        var latest = builds
+            .Where(b => b.Kind == BuildKind.SolutionBuild)
+            .MaxBy(b => b.StartedAt);
+
+        return Results.Ok(latest is null ? null : new
+        {
+            latest.Id,
+            latest.Status,
+            latest.StartedAt,
+            latest.FinishedAt,
+            latest.DurationMs,
+            latest.CommitSha,
+        });
+    }
+
     /// <summary>
     /// Triggers a build for a named project and streams SSE output.
     /// projectName must match one of the names returned by GET /api/builds/projects.