Standardize deployment env and deployer handling

scripts/deployment/deploy-bridges-config-ready-chains.sh

@@ -41,6 +41,10 @@ SIMULATE="${SIMULATE:-0}"
 PREFLIGHT="${PREFLIGHT:-1}"
 CHAIN="${1:-all}"
 
+if [[ "$DRY_RUN" != "1" && "$SIMULATE" != "1" ]] && ! require_private_key_env; then
+  exit 1
+fi
+
 # Per-chain env for DeployWETHBridges: RPC_URL, CCIP_ROUTER_ADDRESS, LINK_TOKEN_ADDRESS, WETH9_ADDRESS, WETH10_ADDRESS (0x0 to skip)
 run_deploy() {
   local chain_name="$1"
@@ -59,10 +63,6 @@ run_deploy() {
     echo "  Skip $chain_name: set ${rpc_var} and ${router_var} in .env"
     return 0
   fi
-  if [[ -z "${PRIVATE_KEY:-}" ]]; then
-    echo "  Skip $chain_name: PRIVATE_KEY not set"
-    return 0
-  fi
   if [[ -z "$weth9" || -z "$weth10" ]]; then
     echo "  Skip $chain_name: set ${weth9_var} and ${weth10_var} in .env (native wrapped token addresses from chain)"
     return 0