optimize(i10): align bytetrack defaults with Optuna-calibrated values

Apply Optuna-found parameter values as new defaults: lost_track_buffer 30→62,
track_activation_threshold 0.7→0.314, q_scale 0.01→0.00246, r_scale 0.1→0.292,
p_scale 1.0→7.34, velocity_decay 0.95→0.817, q_miss_alpha 0.1→0.461,
max_interpolation_gap 20→30, p_reset_threshold 5→13; HOTA 56.781→57.424 (+1.13%)

---
Co-authored-by: Claude Code <noreply@anthropic.com>

Author: Borda

autotrack/default_config.json

@@ -2,20 +2,20 @@
     "_comment": "Default tracker parameters used for baseline evaluation (--n-trials 1).",
     "_edit_here": "Edit this file to change defaults. Do not hard-code values in optimize_tracking.py.",
     "bytetrack": {
-        "lost_track_buffer": 30,
-        "track_activation_threshold": 0.7,
+        "lost_track_buffer": 62,
+        "track_activation_threshold": 0.314,
         "minimum_consecutive_frames": 2,
-        "minimum_iou_threshold": 0.1,
+        "minimum_iou_threshold": 0.109,
         "stage2_iou_threshold": 0.05,
         "iou_age_weight": 0.03,
         "high_conf_det_threshold": 0.6,
-        "q_scale": 0.01,
-        "r_scale": 0.1,
-        "p_scale": 1.0,
-        "velocity_decay": 0.95,
-        "q_miss_alpha": 0.1,
-        "max_interpolation_gap": 20,
-        "p_reset_threshold": 5,
+        "q_scale": 0.00246,
+        "r_scale": 0.292,
+        "p_scale": 7.34,
+        "velocity_decay": 0.817,
+        "q_miss_alpha": 0.461,
+        "max_interpolation_gap": 30,
+        "p_reset_threshold": 13,
         "oru_threshold": 2
     },
     "sort": {