feat(ai): pgvector embedding infrastructure (#19)

2026-07-02 03:00:06 +02:00
parent d78fe601ff
commit 2056548702
10 changed files with 854 additions and 5 deletions
@@ -85,10 +85,18 @@ public class AppDbContext : DbContext, IAppDbContext
                .HasMethod("gin").HasOperators("gin_trgm_ops");
            modelBuilder.Entity<MailDomain>().HasIndex(d => d.Name)
                .HasMethod("gin").HasOperators("gin_trgm_ops");
+
+            // pgvector: 768-dim embedding for semantic search, with an HNSW cosine index.
+            // Populated by the embedding backfill worker when AI is enabled; null otherwise.
+            modelBuilder.HasPostgresExtension("vector");
+            modelBuilder.Entity<Email>().Property(e => e.Embedding).HasColumnType("vector(768)");
+            modelBuilder.Entity<Email>().HasIndex(e => e.Embedding)
+                .HasMethod("hnsw").HasOperators("vector_cosine_ops");
        }
        else
        {
            modelBuilder.Entity<Email>().Ignore(e => e.SearchVector);
+            modelBuilder.Entity<Email>().Ignore(e => e.Embedding);
        }

        base.OnModelCreating(modelBuilder);