Standardize deployment env and deployer handling

scripts/deployment/deploy-all-phases.sh

@@ -32,12 +32,6 @@ elif [[ -n "${REPO_ROOT:-}" && -f "$REPO_ROOT/.env" ]]; then
   set +a
 fi
 
-if [ -f .env ]; then
-  set -a
-  source .env
-  set +a
-fi
-
 RPC="${RPC_URL_138:-http://192.168.11.211:8545}"
 GAS_PRICE="${GAS_PRICE_138:-1000000000}"
 DRY_RUN=""
@@ -56,8 +50,7 @@ while [ $# -gt 0 ]; do
   shift
 done
 
-if [ -z "${PRIVATE_KEY:-}" ]; then
-  echo "ERROR: PRIVATE_KEY not set in .env"
+if ! require_private_key_env; then
   exit 1
 fi