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>

src/AcDream.App/Streaming/StreamingMutationException.cs

@@ -0,0 +1,20 @@
+namespace AcDream.App.Streaming;
+
+/// <summary>
+/// Reports whether a streaming queue/retirement mutation crossed its commit
+/// point before a callback failed. Retry ledgers use this to avoid submitting
+/// the same generation operation twice after a post-commit diagnostic error.
+/// </summary>
+public sealed class StreamingMutationException : Exception
+{
+    public StreamingMutationException(
+        string message,
+        bool mutationCommitted,
+        Exception? innerException = null)
+        : base(message, innerException)
+    {
+        MutationCommitted = mutationCommitted;
+    }
+
+    public bool MutationCommitted { get; }
+}