refactor: Update type hints and enhance affinity calculations in playground.py

- Changed function signatures to use `Sequence` instead of `list` for better type flexibility.
- Introduced a new function `calculate_tracking_detection_affinity` to streamline the calculation of affinities between tracking and detection objects.
- Refactored existing affinity calculation logic to improve clarity and performance, leveraging the new affinity function.
- Removed commented-out code to clean up the implementation and enhance readability.

app/camera/__init__.py

@@ -1,7 +1,7 @@
 from collections import OrderedDict, defaultdict
 from dataclasses import dataclass
 from datetime import datetime
-from typing import Any, TypeAlias, TypedDict, Optional
+from typing import Any, TypeAlias, TypedDict, Optional, Sequence
 
 from beartype import beartype
 import jax
@@ -463,7 +463,7 @@ class Detection:
 
 
 def classify_by_camera(
-    detections: list[Detection],
+    detections: Sequence[Detection],
 ) -> OrderedDict[CameraID, list[Detection]]:
     """
     Classify detections by camera
@@ -677,7 +677,7 @@ def compute_affinity_epipolar_constraint_with_pairs(
 
 
 def calculate_affinity_matrix_by_epipolar_constraint(
-    detections: list[Detection] | dict[CameraID, list[Detection]],
+    detections: Sequence[Detection] | dict[CameraID, Sequence[Detection]],
     alpha_2d: float,
 ) -> tuple[list[Detection], Num[Array, "N N"]]:
     """