feat(auth): replace TOTP with phone-first login

Tiku.Infrastructure/Persistence/Migrations/20260728093337_RemoveMfaAuthentication.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Tiku.Infrastructure.Persistence.Migrations
+{
+    /// <inheritdoc />
+    public partial class RemoveMfaAuthentication : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "mfa_satisfied",
+                table: "auth_sessions");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<bool>(
+                name: "mfa_satisfied",
+                table: "auth_sessions",
+                type: "boolean",
+                nullable: false,
+                defaultValue: false);
+        }
+    }
+}

Tiku.Infrastructure/Persistence/Migrations/TikuDbContextModelSnapshot.cs

@@ -13318,10 +13318,6 @@ namespace Tiku.Infrastructure.Persistence.Migrations
                         .HasColumnName("metadata")
                         .HasDefaultValueSql("'{}'::jsonb");
 
-                    b.Property<bool>("MfaSatisfied")
-                        .HasColumnType("boolean")
-                        .HasColumnName("mfa_satisfied");
-
                     b.Property<Guid?>("ParentSessionId")
                         .HasColumnType("uuid")
                         .HasColumnName("parent_session_id");