feat(event-subscriber): project a status-set as INGESCHREVEN via hoofdObject (refs #75)

Bind the NRC hoofdObject, recognise a zaken/status/create notification, and key the
projection on the zaak (hoofdObject) so the status updates the existing INGEDIEND row
to INGESCHREVEN — without reading OpenZaak (§8.1). Retain the ZGW resource in the log
(new column + migration) so a rebuild reproduces the approved status. Updates the
acceptance fakes for the new IAclClient/IZaakGateway members.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

services/projection-api/Projection.ReadModel/EfNotificationLog.cs

@@ -15,6 +15,7 @@ public sealed class EfNotificationLog(ProjectionDbContext db) : INotificationLog
             Key = notification.Key,
             Actie = notification.Actie,
             ZaakId = notification.ZaakId,
+            Resource = notification.Resource,
             ReceivedAt = DateTimeOffset.UtcNow,
         });
 
@@ -34,6 +35,6 @@ public sealed class EfNotificationLog(ProjectionDbContext db) : INotificationLog
     public async Task<IReadOnlyList<RecordedNotification>> AllAsync(CancellationToken ct = default)
         => await db.ProcessedNotifications
             .OrderBy(r => r.ReceivedAt)
-            .Select(r => new RecordedNotification(r.Key, r.Actie, r.ZaakId))
+            .Select(r => new RecordedNotification(r.Key, r.Actie, r.ZaakId, r.Resource))
             .ToListAsync(ct);
 }

services/projection-api/Projection.ReadModel/Migrations/20260713145944_AddNotificationResource.Designer.cs

@@ -0,0 +1,84 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using Projection.ReadModel;
+
+#nullable disable
+
+namespace Projection.ReadModel.Migrations
+{
+    [DbContext(typeof(ProjectionDbContext))]
+    [Migration("20260713145944_AddNotificationResource")]
+    partial class AddNotificationResource
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.0")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("Projection.ReadModel.ProcessedNotificationRow", b =>
+                {
+                    b.Property<string>("Key")
+                        .HasColumnType("text")
+                        .HasColumnName("key");
+
+                    b.Property<string>("Actie")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("actie");
+
+                    b.Property<DateTimeOffset>("ReceivedAt")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("received_at");
+
+                    b.Property<string>("Resource")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("resource");
+
+                    b.Property<string>("ZaakId")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("zaak_id");
+
+                    b.HasKey("Key");
+
+                    b.ToTable("processed_notifications", (string)null);
+                });
+
+            modelBuilder.Entity("Projection.ReadModel.RegisterEntryRow", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text")
+                        .HasColumnName("id");
+
+                    b.Property<string>("Bsn")
+                        .HasColumnType("text")
+                        .HasColumnName("bsn");
+
+                    b.Property<string>("NaamPlaceholder")
+                        .HasColumnType("text")
+                        .HasColumnName("naam_placeholder");
+
+                    b.Property<string>("Status")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("status");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("register_projection", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

services/projection-api/Projection.ReadModel/Migrations/20260713145944_AddNotificationResource.cs

@@ -0,0 +1,31 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Projection.ReadModel.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddNotificationResource : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            // Pre-existing rows are all zaak-creates (the only notification the projector recorded
+            // before S-09b), so default the backfill to "zaak" rather than "".
+            migrationBuilder.AddColumn<string>(
+                name: "resource",
+                table: "processed_notifications",
+                type: "text",
+                nullable: false,
+                defaultValue: "zaak");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "resource",
+                table: "processed_notifications");
+        }
+    }
+}

services/projection-api/Projection.ReadModel/Migrations/ProjectionDbContextModelSnapshot.cs

@@ -37,6 +37,11 @@ namespace Projection.ReadModel.Migrations
                         .HasColumnType("timestamp with time zone")
                         .HasColumnName("received_at");
 
+                    b.Property<string>("Resource")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("resource");
+
                     b.Property<string>("ZaakId")
                         .IsRequired()
                         .HasColumnType("text")

services/projection-api/Projection.ReadModel/ProjectionDbContext.cs

@@ -35,6 +35,7 @@ public sealed class ProjectionDbContext(DbContextOptions<ProjectionDbContext> op
             e.Property(r => r.Key).HasColumnName("key");
             e.Property(r => r.Actie).HasColumnName("actie").IsRequired();
             e.Property(r => r.ZaakId).HasColumnName("zaak_id").IsRequired();
+            e.Property(r => r.Resource).HasColumnName("resource").IsRequired();
             e.Property(r => r.ReceivedAt).HasColumnName("received_at");
         });
     }
@@ -55,5 +56,10 @@ public sealed class ProcessedNotificationRow
     public required string Key { get; set; }
     public required string Actie { get; set; }
     public required string ZaakId { get; set; }
+
+    /// <summary>The ZGW resource (e.g. <c>zaak</c> or <c>status</c>) — retained so a rebuild reprojects
+    /// the right status without reading OpenZaak (S-09b).</summary>
+    public required string Resource { get; set; }
+
     public DateTimeOffset ReceivedAt { get; set; }
 }