feat!: reorganize detection and tracking pipeline

Refactor the package into common, schema, detection, and tracking namespaces and move dataset-specific ActualTest utilities into tests/support.

Add a pluggable detection stack with typed protocols, pydantic-settings config, loguru-based runner logging, cvmmap and headless video sources, NATS and parquet sinks, and a structured coco-wholebody133 payload path.

Teach tracking replay loading to consume parquet detection directories directly, preserve empty frames, and keep the video-to-parquet-to-tracking workflow usable for offline E2E runs.

Vendor the local mmcv and xtcocotools wheels under Git LFS, update uv sources/lock state, and refresh the mmcv build so mmcv.ops loads successfully with the current torch+cu130 environment.

tests/test_tracker_single_person.py

@@ -5,9 +5,9 @@ import pytest
 
 pytest.importorskip("rpt")
 
-from pose_tracking_exp.joints import BODY20_INDEX_BY_NAME
-from pose_tracking_exp.models import CameraCalibration, CameraFrame, FrameBundle, ProposalCluster, SceneConfig, TrackerConfig
-from pose_tracking_exp.tracker import PoseTracker
+from pose_tracking_exp.common.joints import BODY20_INDEX_BY_NAME
+from pose_tracking_exp.schema import CameraCalibration, CameraFrame, FrameBundle, ProposalCluster, SceneConfig, TrackerConfig
+from pose_tracking_exp.tracking import PoseTracker
 
 
 def _make_scene() -> SceneConfig:
@@ -96,7 +96,7 @@ def test_single_person_mode_caps_active_tracks(monkeypatch) -> None:
     tracker = PoseTracker(
         _make_scene(),
         TrackerConfig(
-            mode="single_person",
+            max_active_tracks=1,
             tentative_min_age=1,
             tentative_hits_required=1,
             tentative_promote_score=0.0,
@@ -127,7 +127,7 @@ def test_single_person_mode_reuses_lost_track_id(monkeypatch) -> None:
     tracker = PoseTracker(
         _make_scene(),
         TrackerConfig(
-            mode="single_person",
+            max_active_tracks=1,
             tentative_min_age=1,
             tentative_hits_required=1,
             tentative_promote_score=0.0,