fix(rendering): bound portal resource lifetime

Separate logical ownership, render publication, and GPU retirement across live entities, landblocks, particles, textures, mesh arenas, portal/UI teardown, and per-frame scratch storage. Add bounded DAT/texture caches, upload budgets, three-frame fence retirement, exact-incarnation appearance reconciliation, frame pacing, and extensive lifetime conformance coverage.\n\nThe seven-destination connected route now cuts peak working/private memory roughly in half, returns Caul to 125-153 FPS locally, and produces no WER or AMD reset.\n\nCo-authored-by: OpenAI Codex <codex@openai.com>

tests/AcDream.App.Tests/Rendering/OrderedResourceTeardownTests.cs

@@ -0,0 +1,52 @@
+using AcDream.App.Rendering;
+
+namespace AcDream.App.Tests.Rendering;
+
+public sealed class OrderedResourceTeardownTests
+{
+    [Fact]
+    public void FailureStopsDependentsAndRetryResumesExactStage()
+    {
+        var calls = new List<int>();
+        int attempts = 0;
+        var teardown = new OrderedResourceTeardown(
+            () => calls.Add(1),
+            () =>
+            {
+                calls.Add(2);
+                if (attempts++ == 0)
+                    throw new InvalidOperationException("synthetic stage failure");
+            },
+            () => calls.Add(3));
+
+        Assert.Throws<InvalidOperationException>(teardown.Advance);
+        Assert.Equal([1, 2], calls);
+        Assert.Equal(1, teardown.NextStage);
+
+        teardown.Advance();
+
+        Assert.Equal([1, 2, 2, 3], calls);
+        Assert.True(teardown.IsComplete);
+    }
+
+    [Fact]
+    public void ReentrantAdvanceDoesNotReplayActiveStage()
+    {
+        OrderedResourceTeardown? teardown = null;
+        int first = 0;
+        int second = 0;
+        teardown = new OrderedResourceTeardown(
+            () =>
+            {
+                first++;
+                teardown!.Advance();
+            },
+            () => second++);
+
+        teardown.Advance();
+
+        Assert.Equal(1, first);
+        Assert.Equal(1, second);
+        Assert.True(teardown.IsComplete);
+    }
+}