test(render) Campaign FW1: pose-aware oracle trace parser

WalkOracleTrace decodes the P lines of the pose-stamped capture round
(raw IEEE-754 dwords from Render::viewer_pos @0x0081ef00: camera cell,
world origin, the four Frame quaternion components in storage order)
into WalkOraclePose on each frame. Poseless FW0 fixtures parse as
before.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/AcDream.App.Tests/Rendering/Walk/WalkOracleTrace.cs

@@ -22,6 +22,7 @@ public static class WalkOracleTrace
         var frames = new List<WalkOracleFrame>();
         List<WalkOracleEvent>? current = null;
         int currentNumber = 0;
+        WalkOraclePose? currentPose = null;
 
         foreach (string line in lines)
         {
@@ -29,15 +30,39 @@ public static class WalkOracleTrace
             if (frameMatch.Success)
             {
                 if (current is not null)
-                    frames.Add(new WalkOracleFrame(currentNumber, current));
+                    frames.Add(new WalkOracleFrame(currentNumber, current, currentPose));
                 currentNumber = int.Parse(
                     frameMatch.Groups[1].Value, CultureInfo.InvariantCulture);
                 current = new List<WalkOracleEvent>();
+                currentPose = null;
                 continue;
             }
             if (current is null)
                 continue;
 
+            Match poseMatch = PosePattern.Match(line);
+            if (poseMatch.Success)
+            {
+                // P <objcell_id> <origin xyz> <quat q0..q3> — raw IEEE-754 dwords
+                // dumped from Render::viewer_pos @0x0081ef00 at the frame marker.
+                uint[] raw = new uint[8];
+                for (int i = 0; i < 8; i++)
+                    raw[i] = uint.Parse(
+                        poseMatch.Groups[i + 1].Value,
+                        NumberStyles.HexNumber, CultureInfo.InvariantCulture);
+                currentPose = new WalkOraclePose(
+                    raw[0],
+                    new System.Numerics.Vector3(
+                        BitConverter.Int32BitsToSingle((int)raw[1]),
+                        BitConverter.Int32BitsToSingle((int)raw[2]),
+                        BitConverter.Int32BitsToSingle((int)raw[3])),
+                    BitConverter.Int32BitsToSingle((int)raw[4]),
+                    BitConverter.Int32BitsToSingle((int)raw[5]),
+                    BitConverter.Int32BitsToSingle((int)raw[6]),
+                    BitConverter.Int32BitsToSingle((int)raw[7]));
+                continue;
+            }
+
             if (line == "LS")
             {
                 current.Add(WalkOracleEvent.Landscape());
@@ -102,13 +127,32 @@ public static class WalkOracleTrace
         => uint.Parse(hex, NumberStyles.HexNumber, CultureInfo.InvariantCulture);
 
     private static readonly Regex FramePattern = new(@"^F (\d+)\s*$", RegexOptions.Compiled);
+    private static readonly Regex PosePattern = new(
+        @"^P ([0-9a-f]{8}) ([0-9a-f]{8}) ([0-9a-f]{8}) ([0-9a-f]{8}) ([0-9a-f]{8}) ([0-9a-f]{8}) ([0-9a-f]{8}) ([0-9a-f]{8})\s*$",
+        RegexOptions.Compiled);
     private static readonly Regex BuildingPattern = new(@"^BLD ([0-9a-f]{8})\s*$", RegexOptions.Compiled);
     private static readonly Regex DrawInsidePattern = new(@"^DI ([0-9a-f]{8})\s*$", RegexOptions.Compiled);
     private static readonly Regex DrawCellsPattern = new(
         @"^DC pv=[0-9a-f]{8} ov=(\d+) n=(\d+):((?: [0-9a-f]{8})*)\s*$", RegexOptions.Compiled);
 }
 
-public sealed record WalkOracleFrame(int Number, IReadOnlyList<WalkOracleEvent> Events)
+/// <summary>The camera pose dumped at the frame marker (raw dwords from
+/// <c>Render::viewer_pos</c> @0x0081ef00): the camera's cell id, world
+/// origin, and the Frame quaternion's four raw components (q0..q3 in
+/// storage order — axis convention resolved by the replay runner).
+/// Present only in the pose-stamped capture round.</summary>
+public sealed record WalkOraclePose(
+    uint CellId,
+    System.Numerics.Vector3 Origin,
+    float Q0,
+    float Q1,
+    float Q2,
+    float Q3);
+
+public sealed record WalkOracleFrame(
+    int Number,
+    IReadOnlyList<WalkOracleEvent> Events,
+    WalkOraclePose? Pose = null)
 {
     /// <summary>The frame's root: the first DrawInside cell, or null when outdoor-rooted.</summary>
     public uint? InteriorRootCell