feat(physics): port retail projectile integration

Add a pure Core projectile driver for retail clock quanta, final-state acceleration, 50-unit velocity clamping, world-space angular integration, full-3D AlignPath, and oriented Setup-local sphere sweeps. Preserve exact success versus set_frame-only failure semantics, independent Contact/OnWalkable state, and full-cell identity across all landblock directions.

Port OBJECTINFO::missile_ignore with explicit weenie/creature metadata, remove the invented transition-step cap, retain PathClipped without arming PerfectClip, and keep authoritative target identity optional. Add malformed-shape/clock, thin-wall, terrain, target-exclusion, frame-spike, failure-state, and boundary conformance coverage.

Retire TS-2 and synchronize the architecture, milestones, roadmap, research oracle, and durable physics memory.

Co-Authored-By: Codex <noreply@openai.com>

src/AcDream.Core/Physics/ResolveResult.cs

@@ -34,4 +34,21 @@ public readonly record struct ResolveResult(
     /// start cell or was immediately stuck. The camera <c>SweepEye</c> reads this
     /// to trigger <c>SmartBox::update_viewer</c>'s fallbacks. Default <c>true</c>
     /// so existing callers are unaffected.</summary>
-    bool Ok = true);
+    bool Ok = true,
+    /// <summary>
+    /// Final transition orientation. Projectile callers consume the
+    /// interpolated frame committed before a PathClipped collision; legacy
+    /// point/capsule callers leave this at identity and ignore it.
+    /// </summary>
+    Quaternion Orientation = default,
+    /// <summary>
+    /// Exact retail SetPositionInternal contact-plane-valid result. This is
+    /// distinct from <see cref="OnWalkable"/>: a steep surface may be contact
+    /// without being ground.
+    /// </summary>
+    bool InContact = false,
+    /// <summary>
+    /// Exact retail walkability result after testing the contact-plane normal
+    /// against <see cref="PhysicsGlobals.FloorZ"/>.
+    /// </summary>
+    bool OnWalkable = false);