Refactor bootstrap error handling with helper

Extract repeated fatal-error logic into a `_bootstrap_die` helper across alpine-install.func, build.func, and install.func. The helper uses `msg_error` when available, falling back to stderr, then exits with code 115. Inline error blocks are replaced with cleaner one-liner `|| _bootstrap_die` calls.

CHANGELOG.md

@@ -510,20 +510,6 @@ Exercise vigilance regarding copycat or coat-tailing sites that seek to exploit
 
 ## 2026-07-29
 
-### 🚀 Updated Scripts
-
-  - backup virtual printer in bambuddy [@asylumexp](https://github.com/asylumexp) ([#16142](https://github.com/community-scripts/ProxmoxVE/pull/16142))
-
-  - #### 🐞 Bug Fixes
-
-    - ImmichFrame: check .NET SDK before update deployment [@aidaskni](https://github.com/aidaskni) ([#16104](https://github.com/community-scripts/ProxmoxVE/pull/16104))
-
-### 💾 Core
-
-  - #### ✨ New Features
-
-    - core: Harden remote func bootstrapping with dns issues [@MickLesk](https://github.com/MickLesk) ([#16146](https://github.com/community-scripts/ProxmoxVE/pull/16146))
-
 ## 2026-07-28
 
 ### 🚀 Updated Scripts

ct/bambuddy.sh

@@ -42,8 +42,7 @@ function update_script() {
       /opt/bambuddy/data \
       /opt/bambuddy/bambuddy.db \
       /opt/bambuddy/bambutrack.db \
-      /opt/bambuddy/archive \
+      /opt/bambuddy/archive
-      /opt/bambuddy/virtual_printer
     msg_ok "Backed up Configuration and Data"
 
     CLEAN_INSTALL=1 fetch_and_deploy_gh_release "bambuddy" "maziggy/bambuddy" "tarball" "latest" "/opt/bambuddy"

ct/immichframe.sh

@@ -30,25 +30,6 @@ function update_script() {
     exit
   fi
 
-  if ! dotnet --list-sdks 2>/dev/null | grep -q '^8\.'; then
-    msg_info "Installing .NET SDK 8.0"
-    if [[ "$(arch_resolve)" == "arm64" ]]; then
-      curl -fsSL https://dot.net/v1/dotnet-install.sh -o /tmp/dotnet-install.sh
-      $STD bash /tmp/dotnet-install.sh --channel 8.0 --install-dir /usr/lib/dotnet8
-      ln -sf /usr/lib/dotnet8/dotnet /usr/bin/dotnet
-      rm -f /tmp/dotnet-install.sh
-    else
-      setup_deb822_repo \
-        "microsoft" \
-        "https://packages.microsoft.com/keys/microsoft-2025.asc" \
-        "https://packages.microsoft.com/debian/13/prod/" \
-        "trixie" \
-        "main"
-      $STD apt install -y dotnet-sdk-8.0
-    fi
-    msg_ok "Installed .NET SDK 8.0"
-  fi
-
   if check_for_gh_release "immichframe" "immichFrame/ImmichFrame"; then
     msg_info "Stopping Service"
     systemctl stop immichframe