refactor(core): Major update to core functions with validation, IPv6 support, and Debian 13 fixes

- alpine-tools.func: Complete rewrite with simplified structure and better error handling
- build.func: Add comprehensive validation functions (Container-ID, hostname, MAC, VLAN, MTU, IPv6, bridge, gateway, timezone, tags), storage space validation, improved password handling
- core.func: Add ensure_profile_loaded() and get_lxc_ip() functions, improved cleanup_lxc() with fallback error handling
- install.func: Fix Debian 13 LXC template bug (root owned by nobody), integrate get_lxc_ip()
- tools.func: Add IPv6 fallback support, improved NVIDIA GPU detection (including Open Kernel Module), Debian 13 Trixie support, new setup_meilisearch() function, completely reworked MariaDB setup with distribution package fallback

scripts/core/alpine-install.func

@@ -11,6 +11,9 @@ source "$(dirname "${BASH_SOURCE[0]}")/error-handler.func"
 load_functions
 catch_errors
 
+# Get LXC IP address (must be called INSIDE container, after network is up)
+get_lxc_ip
+
 # This function enables IPv6 if it's not disabled and sets verbose mode
 verb_ip6() {
   set_std_mode # Set STD mode based on VERBOSE
@@ -125,22 +128,13 @@ update_os() {
 # This function modifies the message of the day (motd) and SSH settings
 motd_ssh() {
   echo "export TERM='xterm-256color'" >>/root/.bashrc
-  IP=$(ip -4 addr show eth0 | awk '/inet / {print $2}' | cut -d/ -f1 | head -n 1)
-
-  if [ -f "/etc/os-release" ]; then
-    OS_NAME=$(grep ^NAME /etc/os-release | cut -d= -f2 | tr -d '"')
-    OS_VERSION=$(grep ^VERSION_ID /etc/os-release | cut -d= -f2 | tr -d '"')
-  else
-    OS_NAME="Alpine Linux"
-    OS_VERSION="Unknown"
-  fi
 
   PROFILE_FILE="/etc/profile.d/00_lxc-details.sh"
   echo "echo -e \"\"" >"$PROFILE_FILE"
   echo -e "echo -e \"${BOLD}${APPLICATION} LXC Container${CL}"\" >>"$PROFILE_FILE"
   echo -e "echo -e \"${TAB}${GATEWAY}${YW} Provided by: ${GN}community-scripts ORG ${YW}| GitHub: ${GN}https://github.com/community-scripts/ProxmoxVE${CL}\"" >>"$PROFILE_FILE"
   echo "echo \"\"" >>"$PROFILE_FILE"
-  echo -e "echo -e \"${TAB}${OS}${YW} OS: ${GN}${OS_NAME} - Version: ${OS_VERSION}${CL}\"" >>"$PROFILE_FILE"
+  echo -e "echo -e \"${TAB}${OS}${YW} OS: ${GN}\$(grep ^NAME /etc/os-release | cut -d= -f2 | tr -d '\"') - Version: \$(grep ^VERSION_ID /etc/os-release | cut -d= -f2 | tr -d '\"')${CL}\"" >>"$PROFILE_FILE"
   echo -e "echo -e \"${TAB}${HOSTNAME}${YW} Hostname: ${GN}\$(hostname)${CL}\"" >>"$PROFILE_FILE"
   echo -e "echo -e \"${TAB}${INFO}${YW} IP Address: ${GN}\$(ip -4 addr show eth0 | awk '/inet / {print \$2}' | cut -d/ -f1 | head -n 1)${CL}\"" >>"$PROFILE_FILE"