feat(telemetry): add 'validation' status, fix status transitions, show 20 log lines

Status flow is now: installing → validation → configuring → success/failed

Changes:
- post_progress_to_api() accepts optional status parameter (default: configuring)
- build.func: Send 'validation' before storage/template/cluster checks
- build.func: Send 'configuring' just before lxc-attach (app install)
- build.func: Remove redundant progress pings during container start/network
- install.func + alpine-install.func: Accept status parameter in container-side
  post_progress_to_api()
- core.func + vm-core.func: silent() now shows last 20 lines on error (was 10)

misc/alpine-install.func

@@ -25,7 +25,9 @@ get_lxc_ip
 # post_progress_to_api()
 #
 # - Lightweight progress ping from inside the container
-# - Updates the existing telemetry record status from "installing" to "configuring"
+# - Updates the existing telemetry record status
+# - Arguments:
+#   * $1: status (optional, default: "configuring")
 # - Signals that the installation is actively progressing (not stuck)
 # - Fire-and-forget: never blocks or fails the script
 # - Only executes if DIAGNOSTICS=yes and RANDOM_UUID is set
@@ -35,9 +37,11 @@ post_progress_to_api() {
   [[ "${DIAGNOSTICS:-no}" == "no" ]] && return 0
   [[ -z "${RANDOM_UUID:-}" ]] && return 0
 
+  local progress_status="${1:-configuring}"
+
   curl -fsS -m 5 -X POST "https://telemetry.community-scripts.org/telemetry" \
     -H "Content-Type: application/json" \
-    -d "{\"random_id\":\"${RANDOM_UUID}\",\"execution_id\":\"${EXECUTION_ID:-${RANDOM_UUID}}\",\"type\":\"lxc\",\"nsapp\":\"${app:-unknown}\",\"status\":\"configuring\"}" &>/dev/null || true
+    -d "{\"random_id\":\"${RANDOM_UUID}\",\"execution_id\":\"${EXECUTION_ID:-${RANDOM_UUID}}\",\"type\":\"lxc\",\"nsapp\":\"${app:-unknown}\",\"status\":\"${progress_status}\"}" &>/dev/null || true
 }
 
 # This function enables IPv6 if it's not disabled and sets verbose mode

misc/api.func

@@ -741,7 +741,10 @@ EOF
 # post_progress_to_api()
 #
 # - Lightweight progress ping from host or container
-# - Updates the existing telemetry record status to "configuring"
+# - Updates the existing telemetry record status
+# - Arguments:
+#   * $1: status (optional, default: "configuring")
+#         Valid values: "validation", "configuring"
 # - Signals that the installation is actively progressing (not stuck)
 # - Fire-and-forget: never blocks or fails the script
 # - Only executes if DIAGNOSTICS=yes and RANDOM_UUID is set
@@ -752,12 +755,13 @@ post_progress_to_api() {
   [[ "${DIAGNOSTICS:-no}" == "no" ]] && return 0
   [[ -z "${RANDOM_UUID:-}" ]] && return 0
 
+  local progress_status="${1:-configuring}"
   local app_name="${NSAPP:-${app:-unknown}}"
   local telemetry_type="${TELEMETRY_TYPE:-lxc}"
 
   curl -fsS -m 5 -X POST "${TELEMETRY_URL:-https://telemetry.community-scripts.org/telemetry}" \
     -H "Content-Type: application/json" \
-    -d "{\"random_id\":\"${RANDOM_UUID}\",\"execution_id\":\"${EXECUTION_ID:-${RANDOM_UUID}}\",\"type\":\"${telemetry_type}\",\"nsapp\":\"${app_name}\",\"status\":\"configuring\"}" &>/dev/null || true
+    -d "{\"random_id\":\"${RANDOM_UUID}\",\"execution_id\":\"${EXECUTION_ID:-${RANDOM_UUID}}\",\"type\":\"${telemetry_type}\",\"nsapp\":\"${app_name}\",\"status\":\"${progress_status}\"}" &>/dev/null || true
 }
 
 # ------------------------------------------------------------------------------

misc/build.func

@@ -3912,7 +3912,6 @@ EOF
   for i in {1..10}; do
     if pct status "$CTID" | grep -q "status: running"; then
       msg_ok "Started LXC Container"
-      post_progress_to_api # Signal container is running
       break
     fi
     sleep 1
@@ -3967,7 +3966,6 @@ EOF
       echo -e "${YW}Container may have limited internet access. Installation will continue...${CL}"
     else
       msg_ok "Network in LXC is reachable (ping)"
-      post_progress_to_api # Signal network is ready
     fi
   fi
   # Function to get correct GID inside container
@@ -4039,7 +4037,9 @@ EOF'
   fi
 
   msg_ok "Customized LXC Container"
-  post_progress_to_api # Signal ready for app installation
+
+  # Transition to 'configuring' — container install script is about to run
+  post_progress_to_api "configuring"
 
   # Optional DNS override for retry scenarios (inside LXC, never on host)
   if [[ "${DNS_RETRY_OVERRIDE:-false}" == "true" ]]; then
@@ -4910,6 +4910,9 @@ create_lxc_container() {
   # Report installation start to API early - captures failures in storage/template/create
   post_to_api
 
+  # Transition to 'validation' — Proxmox-internal checks (storage, template, cluster)
+  post_progress_to_api "validation"
+
   # Storage capability check
   check_storage_support "rootdir" || {
     msg_error "No valid storage found for 'rootdir' [Container]"
@@ -5439,7 +5442,6 @@ create_lxc_container() {
   }
 
   msg_ok "LXC Container ${BL}$CTID${CL} ${GN}was successfully created."
-  post_progress_to_api # Signal container creation complete
 }
 
 # ==============================================================================

misc/core.func

@@ -488,7 +488,7 @@ log_section() {
 # silent()
 #
 # - Executes command with output redirected to active log file
-# - On error: displays last 10 lines of log and exits with original exit code
+# - On error: displays last 20 lines of log and exits with original exit code
 # - Temporarily disables error trap to capture exit code correctly
 # - Sources explain_exit_code() for detailed error messages
 # ------------------------------------------------------------------------------
@@ -530,8 +530,8 @@ silent() {
     msg_custom "→" "${YWB}" "${cmd}"
 
     if [[ -s "$logfile" ]]; then
-      echo -e "\n${TAB}--- Last 10 lines of log ---"
-      tail -n 10 "$logfile"
+      echo -e "\n${TAB}--- Last 20 lines of log ---"
+      tail -n 20 "$logfile"
       echo -e "${TAB}-----------------------------------"
       echo -e "${TAB}📋 Full log: ${logfile}\n"
     fi
@@ -1505,7 +1505,7 @@ cleanup_lxc() {
   fi
 
   msg_ok "Cleaned"
-  
+
   # Send progress ping if available (defined in install.func)
   if declare -f post_progress_to_api &>/dev/null; then
     post_progress_to_api

misc/install.func

@@ -51,7 +51,9 @@ get_lxc_ip
 # post_progress_to_api()
 #
 # - Lightweight progress ping from inside the container
-# - Updates the existing telemetry record status from "installing" to "configuring"
+# - Updates the existing telemetry record status
+# - Arguments:
+#   * $1: status (optional, default: "configuring")
 # - Signals that the installation is actively progressing (not stuck)
 # - Fire-and-forget: never blocks or fails the script
 # - Only executes if DIAGNOSTICS=yes and RANDOM_UUID is set
@@ -61,9 +63,11 @@ post_progress_to_api() {
   [[ "${DIAGNOSTICS:-no}" == "no" ]] && return 0
   [[ -z "${RANDOM_UUID:-}" ]] && return 0
 
+  local progress_status="${1:-configuring}"
+
   curl -fsS -m 5 -X POST "https://telemetry.community-scripts.org/telemetry" \
     -H "Content-Type: application/json" \
-    -d "{\"random_id\":\"${RANDOM_UUID}\",\"execution_id\":\"${EXECUTION_ID:-${RANDOM_UUID}}\",\"type\":\"lxc\",\"nsapp\":\"${app:-unknown}\",\"status\":\"configuring\"}" &>/dev/null || true
+    -d "{\"random_id\":\"${RANDOM_UUID}\",\"execution_id\":\"${EXECUTION_ID:-${RANDOM_UUID}}\",\"type\":\"lxc\",\"nsapp\":\"${app:-unknown}\",\"status\":\"${progress_status}\"}" &>/dev/null || true
 }
 
 # ==============================================================================

misc/vm-core.func

@@ -169,7 +169,7 @@ get_active_logfile() {
 # silent()
 #
 # - Executes command with output redirected to active log file
-# - On error: displays last 10 lines of log and exits with original exit code
+# - On error: displays last 20 lines of log and exits with original exit code
 # - Temporarily disables error trap to capture exit code correctly
 # - Sources explain_exit_code() for detailed error messages
 # ------------------------------------------------------------------------------
@@ -207,8 +207,8 @@ silent() {
     msg_custom "→" "${YWB}" "${cmd}"
 
     if [[ -s "$logfile" ]]; then
-      echo -e "\n${TAB}--- Last 10 lines of log ---"
-      tail -n 10 "$logfile"
+      echo -e "\n${TAB}--- Last 20 lines of log ---"
+      tail -n 20 "$logfile"
       echo -e "${TAB}----------------------------\n"
     fi