fix jenkins commit hash env fallback

jenkins/Jenkinsfile.build-and-deploy

@@ -42,7 +42,7 @@ pipeline {
           if (commitHash && !(commitHash ==~ /^[0-9a-fA-F]{7,40}$/)) {
             error('COMMIT_HASH 只能填写 7 到 40 位十六进制 Git commit hash，当前值: ' + commitHash)
           }
-          env.REQUESTED_COMMIT_HASH = commitHash ?: ''
+          env.COMMIT_HASH = commitHash ?: ''
           def database = params.DATABASE?.trim()
           if (!database) {
             error('DATABASE 不能为空。')
@@ -108,14 +108,15 @@ pipeline {
           sh '''
             bash -lc '
               set -euo pipefail
-              if [[ -n "${REQUESTED_COMMIT_HASH}" ]]; then
+              requested_commit="${COMMIT_HASH:-}"
+              if [[ -n "${requested_commit}" ]]; then
                 # Jenkins 先按 SCM 配置完成 checkout；如指定 commit，再拉取远端引用并切到该提交构建。
                 git fetch --tags --prune origin "+refs/heads/*:refs/remotes/origin/*" || git fetch --all --tags --prune
                 if [[ "$(git rev-parse --is-shallow-repository 2>/dev/null || echo false)" == "true" ]]; then
                   git fetch --unshallow --tags || true
                 fi
-                git cat-file -e "${REQUESTED_COMMIT_HASH}^{commit}"
-                resolved_commit="$(git rev-parse "${REQUESTED_COMMIT_HASH}^{commit}")"
+                git cat-file -e "${requested_commit}^{commit}"
+                resolved_commit="$(git rev-parse "${requested_commit}^{commit}")"
                 git checkout --detach "${resolved_commit}"
                 echo "[build-and-deploy] 使用指定 commit 构建: ${resolved_commit}"
               else