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.Content/ObjectMeshData.cs

@@ -42,6 +42,7 @@ public struct StagedEmitter {
 /// Contains vertex data and per-batch index/texture info, but NO GPU resources.
 /// </summary>
 public class ObjectMeshData {
+    private long _estimatedUploadBytes = -1;
     public ulong ObjectId { get; set; }
     public bool IsSetup { get; set; }
     public VertexPositionNormalTexture[] Vertices { get; set; } = Array.Empty<VertexPositionNormalTexture>();
@@ -92,6 +93,36 @@ public class ObjectMeshData {
 
     /// <summary>Edge line vertices for Environment wireframe rendering.</summary>
     public Vector3[] EdgeLines { get; set; } = Array.Empty<Vector3>();
+
+    /// <summary>
+    /// Returns the immutable prepared payload's CPU-to-GPU work estimate.
+    /// Mesh extraction finishes populating the object before publishing it to
+    /// App, so this value can be cached once and reused by the CPU cache,
+    /// staging queue, retry path, and frame-budget planner without repeatedly
+    /// walking every material batch under their locks.
+    /// </summary>
+    public long GetEstimatedUploadBytes()
+    {
+        long cached = System.Threading.Volatile.Read(ref _estimatedUploadBytes);
+        if (cached >= 0)
+            return cached;
+
+        long bytes = IsSetup ? 1024L : 0L;
+        bytes = checked(bytes + (long)Vertices.Length * VertexPositionNormalTexture.Size);
+        foreach (List<TextureBatchData> batches in TextureBatches.Values)
+        {
+            foreach (TextureBatchData batch in batches)
+            {
+                bytes = checked(bytes + batch.TextureData.LongLength);
+                bytes = checked(bytes + (long)batch.Indices.Count * sizeof(ushort));
+            }
+        }
+        if (EnvCellGeometry is not null)
+            bytes = checked(bytes + EnvCellGeometry.GetEstimatedUploadBytes());
+
+        System.Threading.Interlocked.CompareExchange(ref _estimatedUploadBytes, bytes, -1);
+        return System.Threading.Volatile.Read(ref _estimatedUploadBytes);
+    }
 }
 
 /// <summary>