feat(tracking): 汇总 v0.1.3 回放与 ACT 准备进度

新增专家轨迹诊断、原视频估计相机入口和状态参考ACT数据门禁/训练链路；更新版本与进度文档。

验证：120项CPU/USD回归和4步synthetic CPU smoke通过；1333帧默认GUI历史回放PASS。原视频相机完整回放超时124，策略GPU E2E未执行，完整pre-commit工具缺失。

兼容性：HDF5、Cartpole、USD和控制阈值保持不变。本提交为实验进度快照，不宣称完整发布验收通过；数据、视频和权重不纳入。

configs/imitation/data_review.example.json

@@ -0,0 +1,10 @@
+{
+  "schema": "l20_training_review_v1",
+  "hdf5_sha256": null,
+  "asset_sha256": null,
+  "coordinate_and_scale_reviewed": false,
+  "reference_state_targets_accepted": false,
+  "capture_groups_reviewed": false,
+  "reviewer": "",
+  "evidence": ""
+}

configs/imitation/l20_right_act.json

@@ -0,0 +1,20 @@
+{
+  "contract": "l20_goal_reference_act_v1",
+  "hand_side": "right",
+  "control_hz": 30,
+  "chunk_size": 16,
+  "execute_steps": 4,
+  "hidden_dim": 128,
+  "heads": 4,
+  "layers": 2,
+  "latent_dim": 32,
+  "batch_size": 32,
+  "learning_rate": 0.0001,
+  "kl_weight": 10.0,
+  "max_updates": 1000,
+  "evaluate_every": 100,
+  "max_seconds": 600.0,
+  "max_total_frames": 500000,
+  "workspace_radius": 0.8,
+  "seed": 42
+}

configs/imitation/splits.example.json

@@ -0,0 +1,11 @@
+{
+  "schema": "l20_episode_splits_v1",
+  "train": ["demo_000000"],
+  "validation": ["demo_000001"],
+  "test": ["demo_000002"],
+  "episode_groups": {
+    "demo_000000": "REPLACE_WITH_SOURCE_RECORDING_A",
+    "demo_000001": "REPLACE_WITH_SOURCE_RECORDING_B",
+    "demo_000002": "REPLACE_WITH_SOURCE_RECORDING_C"
+  }
+}