Add CMS waveform pre-processing panel with backfill endpoints

GET api/track/waveform-status and POST api/track/{id}/waveform (ApiKey);
CmsTrackService methods; TrackPreProcessing page with per-row and
sequential bulk generation; nav links from TrackList and Index.

DeepDrftManager/Components/Pages/Tracks/TrackList.razor

@@ -12,12 +12,20 @@
 <MudContainer MaxWidth="MaxWidth.Large" Class="mt-8">
     <MudStack Row="true" AlignItems="AlignItems.Center" Justify="Justify.SpaceBetween" Class="mb-4">
         <MudText Typo="Typo.h3">Tracks</MudText>
-        <MudButton Variant="Variant.Filled"
-                   Color="Color.Primary"
-                   StartIcon="@Icons.Material.Filled.Add"
-                   Href="/tracks/new">
-            Add Track
-        </MudButton>
+        <MudStack Row="true" Spacing="2">
+            <MudButton Variant="Variant.Outlined"
+                       Color="Color.Primary"
+                       StartIcon="@Icons.Material.Filled.GraphicEq"
+                       Href="/tracks/preprocessing">
+                Waveform Pre-Processing
+            </MudButton>
+            <MudButton Variant="Variant.Filled"
+                       Color="Color.Primary"
+                       StartIcon="@Icons.Material.Filled.Add"
+                       Href="/tracks/new">
+                Add Track
+            </MudButton>
+        </MudStack>
     </MudStack>
 
     <MudTable T="TrackDto"