fix(lives): OPAL tracks.json carried the old boundaries, off by up to 50 s

These timecodes were generated before #148 — back when track boundaries came
from Pulsar tab-focus events rather than from the audio. Tab focus records when
PLN LOOKED at a file, not when the music changed, so every cut was wrong by
however long he sat on a tab before evaluating it.

Regenerated from the measured boundaries (segments_v3.json) via
Tidal/tools/gig-metadata.py, which now reads that shape directly and matches
segments to the setlist by title rather than by position.

  #  track                        was        now      drift
  5  You My Sunshine              0:25:41    0:25:58    +18s
  7  Piment Bresilien             0:36:51    0:37:07    +17s
  9  Perfect                      0:48:24    0:49:14    +50s
 10  Gimme Acid                   0:53:39    0:54:12    +33s
 11  Ghosts in the Toilets        0:58:48    0:59:20    +32s
 13  Vague de CRIME               1:04:33    1:04:49    +16s
 14  Desire                       1:09:12    1:09:40    +28s

totalDuration_s 4809 -> 4769.1. Tracks 1, 12 and 15 were already correct.

Only timing changed: names, order, bpmRange, styleDistribution and all 60
samplePacks diff byte-identical against the previous file, and venue/stage are
carried through verbatim. This matters beyond the website — Slopmotion reads
this file to cut visuals to the set, so shipping it stale would have put the
cuts half a minute off the music on a third of the album.

content/lives/2026/opal-festival-2026/tracks.json

@@ -18,7 +18,7 @@
     "nujazz": 1
   },
   "trackCount": 15,
-  "totalDuration_s": 4809,
+  "totalDuration_s": 4769.1,
   "samplePacks": [
     "armora",
     "bd",
@@ -88,11 +88,11 @@
       "bpm": 124,
       "section": "Ouverture",
       "style": "techno",
-      "start_s": 0,
-      "end_s": 530,
-      "duration_s": 530,
+      "start_s": 0.0,
+      "end_s": 529.7,
+      "duration_s": 529.7,
       "start": "0:00:00",
-      "end": "0:08:50",
+      "end": "0:08:49",
       "samples": [
         "bd",
         "diams_dj",
@@ -110,11 +110,11 @@
       "bpm": 133,
       "section": "Ouverture",
       "style": "dnb",
-      "start_s": 530,
-      "end_s": 891,
-      "duration_s": 361,
-      "start": "0:08:50",
-      "end": "0:14:51",
+      "start_s": 531.35,
+      "end_s": 889.95,
+      "duration_s": 358.6,
+      "start": "0:08:51",
+      "end": "0:14:49",
       "samples": [
         "cp",
         "e",
@@ -134,11 +134,11 @@
       "bpm": 160,
       "section": "SUNSET",
       "style": "dnb",
-      "start_s": 895,
-      "end_s": 1108,
-      "duration_s": 213,
-      "start": "0:14:55",
-      "end": "0:18:28",
+      "start_s": 890.0,
+      "end_s": 1114.0,
+      "duration_s": 224.0,
+      "start": "0:14:50",
+      "end": "0:18:34",
       "samples": [
         "break",
         "bskick",
@@ -157,11 +157,11 @@
       "bpm": 89,
       "section": "SUNSET",
       "style": "techno",
-      "start_s": 1108,
-      "end_s": 1541,
-      "duration_s": 433,
-      "start": "0:18:28",
-      "end": "0:25:41",
+      "start_s": 1114.4,
+      "end_s": 1558.7,
+      "duration_s": 444.3,
+      "start": "0:18:34",
+      "end": "0:25:58",
       "samples": [
         "bskick",
         "d",
@@ -180,11 +180,11 @@
       "bpm": 166,
       "section": "We call it NuJazz",
       "style": "dnb",
-      "start_s": 1541,
-      "end_s": 1794,
-      "duration_s": 253,
-      "start": "0:25:41",
-      "end": "0:29:54",
+      "start_s": 1558.7,
+      "end_s": 1798.1,
+      "duration_s": 239.4,
+      "start": "0:25:58",
+      "end": "0:29:58",
       "samples": [
         "breaks165",
         "d",
@@ -202,11 +202,11 @@
       "bpm": 124,
       "section": "We call it NuJazz",
       "style": "lounge",
-      "start_s": 1794,
-      "end_s": 2211,
-      "duration_s": 417,
-      "start": "0:29:54",
-      "end": "0:36:51",
+      "start_s": 1798.1,
+      "end_s": 2227.8,
+      "duration_s": 429.7,
+      "start": "0:29:58",
+      "end": "0:37:07",
       "samples": [
         "bd",
         "h",
@@ -225,11 +225,11 @@
       "bpm": 124,
       "section": "We call it NuJazz",
       "style": "collab",
-      "start_s": 2211,
-      "end_s": 2717,
-      "duration_s": 506,
-      "start": "0:36:51",
-      "end": "0:45:17",
+      "start_s": 2227.8,
+      "end_s": 2720.0,
+      "duration_s": 492.2,
+      "start": "0:37:07",
+      "end": "0:45:20",
       "samples": [
         "bd",
         "gfunk_lead",
@@ -247,11 +247,11 @@
       "bpm": 120,
       "section": "We call it NuJazz",
       "style": "lounge",
-      "start_s": 2717,
-      "end_s": 2904,
-      "duration_s": 187,
-      "start": "0:45:17",
-      "end": "0:48:24",
+      "start_s": 2720.0,
+      "end_s": 2954.4,
+      "duration_s": 234.4,
+      "start": "0:45:20",
+      "end": "0:49:14",
       "samples": [
         "bd",
         "breaks165",
@@ -277,11 +277,11 @@
       "bpm": 128,
       "section": "We call it NuJazz",
       "style": "remix",
-      "start_s": 2904,
-      "end_s": 3219,
-      "duration_s": 315,
-      "start": "0:48:24",
-      "end": "0:53:39",
+      "start_s": 2954.4,
+      "end_s": 3252.3,
+      "duration_s": 297.9,
+      "start": "0:49:14",
+      "end": "0:54:12",
       "samples": [
         "breaks165",
         "clubkick",
@@ -302,11 +302,11 @@
       "bpm": 160,
       "section": "NUIT",
       "style": "acid",
-      "start_s": 3219,
-      "end_s": 3528,
-      "duration_s": 309,
-      "start": "0:53:39",
-      "end": "0:58:48",
+      "start_s": 3252.3,
+      "end_s": 3560.2,
+      "duration_s": 307.9,
+      "start": "0:54:12",
+      "end": "0:59:20",
       "samples": [
         "bd",
         "drums_nes",
@@ -326,11 +326,11 @@
       "bpm": 160,
       "section": "NUIT",
       "style": "collab",
-      "start_s": 3528,
-      "end_s": 3682,
-      "duration_s": 154,
-      "start": "0:58:48",
-      "end": "1:01:22",
+      "start_s": 3560.2,
+      "end_s": 3681.6,
+      "duration_s": 121.4,
+      "start": "0:59:20",
+      "end": "1:01:21",
       "samples": [
         "armora",
         "breaks165",
@@ -355,11 +355,11 @@
       "bpm": 160,
       "section": "NUIT",
       "style": "collab",
-      "start_s": 3682,
-      "end_s": 3873,
-      "duration_s": 191,
-      "start": "1:01:22",
-      "end": "1:04:33",
+      "start_s": 3681.6,
+      "end_s": 3889.1,
+      "duration_s": 207.5,
+      "start": "1:01:21",
+      "end": "1:04:49",
       "samples": [
         "breaks165",
         "clubkick",
@@ -380,11 +380,11 @@
       "bpm": 120,
       "section": "NUIT",
       "style": "techno",
-      "start_s": 3873,
-      "end_s": 4152,
-      "duration_s": 279,
-      "start": "1:04:33",
-      "end": "1:09:12",
+      "start_s": 3889.1,
+      "end_s": 4178.7,
+      "duration_s": 289.6,
+      "start": "1:04:49",
+      "end": "1:09:38",
       "samples": [
         "cp",
         "crimewave",
@@ -403,10 +403,10 @@
       "bpm": 129,
       "section": "FINALE",
       "style": "collab",
-      "start_s": 4152,
-      "end_s": 4547,
-      "duration_s": 395,
-      "start": "1:09:12",
+      "start_s": 4180.0,
+      "end_s": 4547.35,
+      "duration_s": 367.35,
+      "start": "1:09:40",
       "end": "1:15:47",
       "samples": [
         "breaks165",
@@ -429,11 +429,11 @@
       "bpm": 114,
       "section": "Encore",
       "style": "nujazz",
-      "start_s": 4547,
-      "end_s": 4813,
-      "duration_s": 266,
+      "start_s": 4547.45,
+      "end_s": 4772.6,
+      "duration_s": 225.15,
       "start": "1:15:47",
-      "end": "1:20:13",
+      "end": "1:19:32",
       "samples": [
         "cp",
         "e",