feat: sync lijiaoqiao implementation and staging validation artifacts

scripts/ci/stage-gate-drill.sh

@@ -0,0 +1,59 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+FAIL_STAGE="${1:-G3}"
+DATE_TAG="${2:-$(date +%F)}"
+PROJECT_ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
+OUT_DIR="$PROJECT_ROOT/reports/gates"
+mkdir -p "$OUT_DIR"
+LOG_FILE="$OUT_DIR/stage_gate_drill_${DATE_TAG}.log"
+
+stages=(G0 G1 G2 G3 G4 G5)
+
+: > "$LOG_FILE"
+
+log() {
+  echo "$1" | tee -a "$LOG_FILE"
+}
+
+log "[INFO] stage gate drill start, fail_stage=$FAIL_STAGE, date=$DATE_TAG"
+pass_count=0
+failed=0
+failed_stage=""
+rollback_to=""
+
+for s in "${stages[@]}"; do
+  if [[ "$s" == "$FAIL_STAGE" ]]; then
+    log "[FAIL] $s quality gate check failed: simulated contract drift"
+    failed=1
+    failed_stage="$s"
+    break
+  fi
+  log "[PASS] $s quality gate check passed"
+  pass_count=$((pass_count+1))
+done
+
+if [[ $failed -eq 0 ]]; then
+  log "[INFO] no failure injected; drill considered invalid"
+  exit 2
+fi
+
+case "$failed_stage" in
+  G0) rollback_to="G0" ;;
+  G1) rollback_to="G0" ;;
+  G2) rollback_to="G1" ;;
+  G3) rollback_to="G2" ;;
+  G4) rollback_to="G3" ;;
+  G5) rollback_to="G4" ;;
+  *) rollback_to="G0" ;;
+esac
+
+log "[ACTION] rollback triggered: from $failed_stage to $rollback_to"
+log "[ACTION] freeze subsequent promotion stages"
+log "[ACTION] open corrective task with 24h SLA"
+log "[PASS] rollback drill complete"
+
+echo "LOG_FILE=$LOG_FILE"
+echo "PASS_COUNT=$pass_count"
+echo "FAILED_STAGE=$failed_stage"
+echo "ROLLBACK_TO=$rollback_to"