Fix some stragglers

diachron/cmd.d/test

@@ -4,7 +4,7 @@ set -eu
 
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
-cd "$DIR/../../express"
+cd "$DIR/../../backend"
 
 if [ $# -eq 0 ]; then
     # Find all test files - use -print0/xargs to handle filenames safely

diachron/common.d/migrate

@@ -5,5 +5,5 @@ set -eu
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 ROOT="$DIR/../.."
 
-cd "$ROOT/express"
+cd "$ROOT/backend"
 "$DIR"/tsx migrate.ts "$@"

diachron/develop.d/reset-db

@@ -5,5 +5,5 @@ set -eu
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 ROOT="$DIR/../.."
 
-cd "$ROOT/express"
+cd "$ROOT/backend"
 "$DIR"/../cmd.d/tsx develop/reset-db.ts "$@"

diachron/mgmt.d/add-user

@@ -5,5 +5,5 @@ set -eu
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 ROOT="$DIR/../.."
 
-cd "$ROOT/express"
+cd "$ROOT/backend"
 "$DIR"/../cmd.d/tsx mgmt/add-user.ts "$@"