feat(waveform): generalize high-res compute to every track (Direction B)

Per-track high-res datum keyed by EntryKey in the renamed track-waveforms vault; computed at upload for all tracks, regenerable per-track via CMS, with a re-runnable backfill. Mix read path repointed so it keeps working.

DeepDrftModels/DTOs/WaveformStatusDto.cs

@@ -1,10 +1,11 @@
 namespace DeepDrftModels.DTOs;
 
 /// <summary>
-/// Per-track waveform profile status for the CMS PreProcessing panel. Tells admins which tracks
-/// already carry a stored loudness profile and which predate the WaveformSeeker feature and need
-/// backfilling. <see cref="HasProfile"/> is the existence check; <see cref="EntryKey"/> is the
-/// vault key used to trigger generation for a missing profile.
+/// Per-track waveform datum status for the CMS PreProcessing panel. Tells admins which tracks already
+/// carry each stored datum and which need backfilling. <see cref="HasProfile"/> is the 512-bucket
+/// player-bar profile; <see cref="HasHighRes"/> is the duration-derived high-res visualizer datum
+/// (phase-12 §5 — every track now carries one). <see cref="EntryKey"/> is the vault key used to trigger
+/// generation for either missing datum.
 /// </summary>
 public class WaveformStatusDto
 {
@@ -12,4 +13,5 @@ public class WaveformStatusDto
     public string EntryKey { get; set; } = string.Empty;
     public string TrackName { get; set; } = string.Empty;
     public bool HasProfile { get; set; }
+    public bool HasHighRes { get; set; }
 }