added auth mimic

.woodpecker.yml

@@ -22,6 +22,7 @@ steps:
         TOKEN="$(gcloud auth print-access-token)"
 
         # Check which images are already in PROD; no arrays to avoid bad-substitution
+        gcloud config set auth/impersonate_service_account "woodpecker-ci@aptivaai-dev.iam.gserviceaccount.com"
         MISSING=""
         for s in server1 server2 server3 nginx; do
           REF="docker://$DST/$s:$IMG_TAG"
@@ -57,7 +58,7 @@ steps:
       - |
         set -euo pipefail
         if [ "${PROMOTE:-}" != "prod" ]; then echo "⏭  Skipping (PROMOTE=$PROMOTE)"; exit 0; fi
-
+        gcloud config set auth/impersonate_service_account "woodpecker-ci@aptivaai-dev.iam.gserviceaccount.com"
         IMG_TAG="$(gcloud secrets versions access latest --secret=IMG_TAG --project=aptivaai-dev)"
         PROD_TAG="$(gcloud secrets versions access latest --secret=IMG_TAG --project=aptivaai-prod)"
         [ "$IMG_TAG" = "$PROD_TAG" ] || { echo "❌ Tag mismatch: dev=$IMG_TAG prod=$PROD_TAG"; exit 1; }
@@ -82,7 +83,7 @@ steps:
       - |
         set -euo pipefail
         if [ "${PROMOTE:-}" != "prod" ]; then echo "⏭  Skipping (PROMOTE=$PROMOTE)"; exit 0; fi
-
+        gcloud config set auth/impersonate_service_account "woodpecker-ci@aptivaai-dev.iam.gserviceaccount.com"
         IMG_TAG="$(gcloud secrets versions access latest --secret=IMG_TAG --project=aptivaai-dev)"
         REG="us-central1-docker.pkg.dev/aptivaai-prod/aptiva-repo"
 
@@ -113,7 +114,7 @@ steps:
         mkdir -p ~/.ssh
 
         # Pull SSH materials for PROD from aptivaai-dev SM (same pattern as staging)
-
+        gcloud config set auth/impersonate_service_account "woodpecker-ci@aptivaai-dev.iam.gserviceaccount.com"
         gcloud secrets versions access latest \
           --secret=PROD_SSH_KEY --project=aptivaai-dev \
           | base64 -d > ~/.ssh/id_ed25519