feat: massive AI generation

apps/backend/PlayerFaction/Api/UpsertPlayerProductionProgramHandler.cs

@@ -0,0 +1,26 @@
+using FastEndpoints;
+
+namespace SpaceGame.Api.PlayerFaction.Api;
+
+public sealed class UpsertPlayerProductionProgramHandler(WorldService worldService) : Endpoint<PlayerProductionProgramCommandRequest, PlayerFactionSnapshot>
+{
+  public override void Configure()
+  {
+    Post("/api/player-faction/production-programs");
+    Put("/api/player-faction/production-programs/{productionProgramId}");
+    AllowAnonymous();
+  }
+
+  public override async Task HandleAsync(PlayerProductionProgramCommandRequest request, CancellationToken cancellationToken)
+  {
+    var productionProgramId = Route<string?>("productionProgramId");
+    var snapshot = worldService.UpsertPlayerProductionProgram(string.IsNullOrWhiteSpace(productionProgramId) ? null : productionProgramId, request);
+    if (snapshot is null)
+    {
+      await SendNotFoundAsync(cancellationToken);
+      return;
+    }
+
+    await SendOkAsync(snapshot, cancellationToken);
+  }
+}