feat: add local Resemblyzer speaker recognition

MeetingAssistant/Speakers/SpeakerIdentity.cs

@@ -21,6 +21,8 @@ public sealed class SpeakerIdentity
 
     public List<SpeakerSnippet> Snippets { get; set; } = [];
 
+    public List<SpeakerVoiceVector> VoiceVectors { get; set; } = [];
+
     public List<SpeakerIdentityReference> References { get; set; } = [];
 
     [NotMapped]
@@ -93,7 +95,7 @@ public static class SpeakerIdentityReferences
             string.IsNullOrWhiteSpace(reference.TranscriptPath);
     }
 
-    private static bool IsSame(SpeakerIdentityReference first, SpeakerIdentityReference second)
+    public static bool IsSame(SpeakerIdentityReference first, SpeakerIdentityReference second)
     {
         return string.Equals(first.MeetingNotePath, second.MeetingNotePath, StringComparison.OrdinalIgnoreCase) &&
             string.Equals(first.TranscriptPath, second.TranscriptPath, StringComparison.OrdinalIgnoreCase);
@@ -124,6 +126,25 @@ public sealed class SpeakerSnippet
     public DateTimeOffset CreatedAt { get; set; }
 }
 
+public sealed class SpeakerVoiceVector
+{
+    public int Id { get; set; }
+
+    public int SpeakerIdentityId { get; set; }
+
+    public SpeakerIdentity? SpeakerIdentity { get; set; }
+
+    public string ModelId { get; set; } = "";
+
+    public int Dimensions { get; set; }
+
+    public byte[] VectorBytes { get; set; } = [];
+
+    public string Fingerprint { get; set; } = "";
+
+    public DateTimeOffset CreatedAt { get; set; }
+}
+
 public sealed class SpeakerAlias
 {
     public int Id { get; set; }
@@ -150,6 +171,8 @@ public sealed class SpeakerIdentityDbContext : DbContext
 
     public DbSet<SpeakerSnippet> SpeakerSnippets => Set<SpeakerSnippet>();
 
+    public DbSet<SpeakerVoiceVector> SpeakerVoiceVectors => Set<SpeakerVoiceVector>();
+
     public DbSet<SpeakerIdentityReference> SpeakerIdentityReferences => Set<SpeakerIdentityReference>();
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
@@ -175,6 +198,11 @@ public sealed class SpeakerIdentityDbContext : DbContext
                 .HasForeignKey(snippet => snippet.SpeakerIdentityId)
                 .OnDelete(DeleteBehavior.Cascade);
 
+            entity.HasMany(identity => identity.VoiceVectors)
+                .WithOne(vector => vector.SpeakerIdentity)
+                .HasForeignKey(vector => vector.SpeakerIdentityId)
+                .OnDelete(DeleteBehavior.Cascade);
+
             entity.HasMany(identity => identity.References)
                 .WithOne(reference => reference.SpeakerIdentity)
                 .HasForeignKey(reference => reference.SpeakerIdentityId)
@@ -189,6 +217,13 @@ public sealed class SpeakerIdentityDbContext : DbContext
             .HasIndex(alias => new { alias.SpeakerIdentityId, alias.Name })
             .IsUnique();
 
+        modelBuilder.Entity<SpeakerVoiceVector>()
+            .HasIndex(vector => new { vector.SpeakerIdentityId, vector.Fingerprint })
+            .IsUnique();
+
+        modelBuilder.Entity<SpeakerVoiceVector>()
+            .HasIndex(vector => new { vector.SpeakerIdentityId, vector.ModelId });
+
         modelBuilder.Entity<SpeakerIdentityReference>()
             .HasIndex(reference => new { reference.SpeakerIdentityId, reference.MeetingNotePath, reference.TranscriptPath })
             .IsUnique();