fix(tests): fix CI integration test failures — add missing migrations and fix provisioning

- Add SyncModel migrations for IdentityDbContext (UserSessions index) and
  AuditDbContext (TenantId column type) — EF Core 10 blocked MigrateAsync
  with "pending model changes" warning, preventing tenant provisioning
- Remove OutboxDispatcherHostedService in test factory — it queries
  OutboxMessages before migrations complete, causing startup errors
- Fix provisioning status endpoint path: /{tenantId}/provisioning (not /status)
- Add login retry for new tenant admin in isolation tests — provisioning
  may still be finalizing when the login attempt fires

Author: iammukeshm

src/Playground/Migrations.PostgreSQL/Audit/20260403185410_SyncModel.Designer.cs

@@ -0,0 +1,38 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace FSH.Migrations.PostgreSQL.Audit
+{
+    /// <inheritdoc />
+    public partial class SyncModel : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<string>(
+                name: "TenantId",
+                schema: "audit",
+                table: "AuditRecords",
+                type: "text",
+                nullable: false,
+                oldClrType: typeof(string),
+                oldType: "character varying(64)",
+                oldMaxLength: 64);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<string>(
+                name: "TenantId",
+                schema: "audit",
+                table: "AuditRecords",
+                type: "character varying(64)",
+                maxLength: 64,
+                nullable: false,
+                oldClrType: typeof(string),
+                oldType: "text");
+        }
+    }
+}

src/Playground/Migrations.PostgreSQL/Audit/20260403185410_SyncModel.cs

@@ -17,7 +17,7 @@ protected override void BuildModel(ModelBuilder modelBuilder)
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "10.0.0")
+                .HasAnnotation("ProductVersion", "10.0.5")
                 .HasAnnotation("Relational:MaxIdentifierLength", 63);
 
             NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
@@ -61,8 +61,7 @@ protected override void BuildModel(ModelBuilder modelBuilder)
 
                     b.Property<string>("TenantId")
                         .IsRequired()
-                        .HasMaxLength(64)
-                        .HasColumnType("character varying(64)");
+                        .HasColumnType("text");
 
                     b.Property<string>("TraceId")
                         .HasColumnType("text");