fix(docker): 修复 PostgreSQL APT 密钥 404 错误，密钥改从官方源下载

pack/Dockerfile

@@ -330,7 +330,7 @@ RUN <<EOF
     set -eux
 
     # Use Tsinghua mirror for PostgreSQL APT repository
-    wget -O /tmp/ACCC4CF8.asc https://mirrors.tuna.tsinghua.edu.cn/postgresql/repos/apt/ACCC4CF8.asc \
+    wget -O /tmp/ACCC4CF8.asc https://www.postgresql.org/media/keys/ACCC4CF8.asc \
         && gpg --dearmor /tmp/ACCC4CF8.asc \
         && mv /tmp/ACCC4CF8.asc.gpg /usr/share/keyrings/postgresql-archive-keyring.gpg \
         && echo "deb [signed-by=/usr/share/keyrings/postgresql-archive-keyring.gpg] https://mirrors.tuna.tsinghua.edu.cn/postgresql/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list