feat: complete IM P0 and P1 reliability work

server/db/mysql/infrastructure_schema_test.go

@@ -0,0 +1,27 @@
+//go:build mysql
+
+package mysql
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestEnsureIMHTTPInfrastructureTablesUsesSelectedTenantDatabase(t *testing.T) {
+	exec := &recordingGroupSchemaExecutor{}
+	if err := ensureIMHTTPInfrastructureTables(exec); err != nil {
+		t.Fatal(err)
+	}
+	if len(exec.statements) != 2 {
+		t.Fatalf("created %d infrastructure tables, want 2", len(exec.statements))
+	}
+	joined := strings.ToLower(strings.Join(exec.statements, "\n"))
+	for _, table := range []string{"im_http_idempotency", "im_business_events_outbox"} {
+		if !strings.Contains(joined, table) {
+			t.Fatalf("missing table %s", table)
+		}
+	}
+	if strings.Contains(joined, "tinode.") || strings.Contains(joined, "create database") || strings.Contains(joined, "tenant_id") {
+		t.Fatalf("infrastructure schema must stay inside the selected tenant database: %s", joined)
+	}
+}