Split API into phase-specific endpoint files

Endpoints/ResultsEndpoints.cs

@@ -0,0 +1,39 @@
+using GameList.Data;
+using GameList.Domain;
+using Microsoft.EntityFrameworkCore;
+
+namespace GameList.Endpoints;
+
+public static class ResultsEndpoints
+{
+    public static void MapResultsEndpoints(this IEndpointRouteBuilder app)
+    {
+        app.MapGet("/api/results", async (AppDbContext db) =>
+        {
+            var phase = await EndpointHelpers.GetPhase(db);
+            if (phase != Phase.Results)
+                return EndpointHelpers.PhaseMismatch(Phase.Results, phase);
+
+            var results = await db.Suggestions.AsNoTracking()
+                .Include(s => s.Player)
+                .Include(s => s.Votes)
+                .Select(s => new
+                {
+                    s.Id,
+                    s.Name,
+                    Author = s.Player!.DisplayName,
+                    Total = s.Votes.Sum(v => v.Score),
+                    Count = s.Votes.Count,
+                    Average = s.Votes.Count == 0 ? 0 : s.Votes.Average(v => v.Score),
+                    s.ScreenshotUrl,
+                    s.YoutubeUrl,
+                    s.Description,
+                    s.Genre
+                })
+                .OrderByDescending(r => r.Total)
+                .ToListAsync();
+
+            return Results.Ok(results);
+        });
+    }
+}