fix(docker): 修复 PostgreSQL 和 Grafana 镜像 404

- PostgreSQL APT 源改回官方 apt.postgresql.org（清华源缺少 noble-pgdg）
- Grafana 改回官方 dl.grafana.com CDN（清华源路径不存在）

pack/Dockerfile

@@ -333,7 +333,7 @@ RUN <<EOF
     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
+        && echo "deb [signed-by=/usr/share/keyrings/postgresql-archive-keyring.gpg] http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list
 
     # Install
     apt-get update -y && apt-get install -y --no-install-recommends \
@@ -484,7 +484,7 @@ RUN <<EOF
     ln -s /opt/prometheus/promtool /usr/local/bin/promtool
 
     curl --retry 3 --retry-connrefused -fL \
-        "https://mirrors.tuna.tsinghua.edu.cn/grafana/oss/grafana-${GRAFANA_VERSION}.linux-${GRAFANA_ARCH}.tar.gz" \
+        "https://dl.grafana.com/oss/release/grafana-${GRAFANA_VERSION}.linux-${GRAFANA_ARCH}.tar.gz" \
         | tar -zx -C /opt
     mv "/opt/grafana-${GRAFANA_VERSION}" /opt/grafana
     ln -s /opt/grafana/bin/grafana-server /usr/local/bin/grafana-server