chore: disable runtime mysql schema creation

server/db/mysql/report_group_regression_test.go

@@ -55,6 +55,66 @@ func TestMessageSearchDoesNotClearScannedHead(t *testing.T) {
 	}
 }
 
+func TestRuntimeOpenDoesNotAutoCreateOrMigrateTables(t *testing.T) {
+	source, err := os.ReadFile("adapter.go")
+	if err != nil {
+		t.Fatal(err)
+	}
+	body := string(source)
+	for _, tc := range []struct {
+		name     string
+		function string
+		end      string
+	}{
+		{
+			name:     "Open",
+			function: "func (a *adapter) Open",
+			end:      "\nfunc (a *adapter) Close",
+		},
+		{
+			name:     "TenantAdapterFor",
+			function: "func (a *adapter) TenantAdapterFor",
+			end:      "\nfunc (a *adapter) tenantByID",
+		},
+	} {
+		fn := sourceBetween(t, body, tc.function, tc.end)
+		for _, forbidden := range []string{
+			"ensureIMRegistrationInviteControlTables",
+			"ensureIMTenantEntryControlTables",
+			"ensureIMGroupBusinessTables",
+			"ensureIMHTTPInfrastructureTables",
+			"ensureIMAdminGovernanceTables",
+			"ensureIMFileReviewTables",
+			"ensureIMOrganizationVisibilityTables",
+			"ensureIMAttendanceTables",
+			"ensureIMMeetingNotesTables",
+			"ensureSnowflakePrimaryKeys",
+			"ensureUserIdentitySchema",
+			"ensureIMRegistrationInviteUseTable",
+			"CREATE DATABASE",
+			"CREATE TABLE",
+			"ALTER TABLE",
+		} {
+			if strings.Contains(fn, forbidden) {
+				t.Fatalf("%s must not auto-create or auto-migrate schema; found %q", tc.name, forbidden)
+			}
+		}
+	}
+}
+
+func sourceBetween(t *testing.T, source, startMarker, endMarker string) string {
+	t.Helper()
+	start := strings.Index(source, startMarker)
+	if start < 0 {
+		t.Fatalf("missing source marker %q", startMarker)
+	}
+	end := strings.Index(source[start:], endMarker)
+	if end < 0 {
+		t.Fatalf("missing source marker %q after %q", endMarker, startMarker)
+	}
+	return source[start : start+end]
+}
+
 func TestSearchPaginationCursorUsesLastReturnedRow(t *testing.T) {
 	source, err := os.ReadFile("tenant_adapter.go")
 	if err != nil {