fix(ha/cluster-init): drop TTY detection, always use \r for sync progress

The TTY check ([[ -t 1 ]]) evaluated false under sudo, causing each update
to print on a new line via log(). Since \r worked correctly in the original
code (user confirmed), drop the branching and always use printf \r.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/ha/cluster-init.sh

@@ -242,40 +242,25 @@ drbdadm primary ha-data --force
 log "Waiting for DRBD initial sync to complete (32 GB may take 10–20 min)..."
 log "  (monitor with: watch -n3 cat /proc/drbd)"
 _sync_chars=('|' '/' '-' $'\\')
-_sync_last_pct=""
 _sync_iter=0
-_is_tty=false; [[ -t 1 ]] && _is_tty=true
 while true; do
   _dstate=$(drbdadm dstate ha-data 2>/dev/null || echo "unknown")
   if echo "$_dstate" | grep -q "UpToDate/UpToDate"; then
-    $_is_tty && printf "\r%-80s\r" ""
+    printf "\r%-80s\r" ""
     log "DRBD initial sync complete (dstate: $_dstate)"
     break
   fi
   # /proc/drbd uses variable whitespace: "sync'ed:  5.2%" (two spaces).
-  # Use [[:space:]]+ to tolerate any amount of whitespace after the colon.
   _pct=$(grep -oE "sync'ed:[[:space:]]+[0-9.]+" /proc/drbd 2>/dev/null | grep -oE "[0-9.]+" | head -1 || echo "")
   _eta=$(grep -oE "finish:[[:space:]]+[0-9:]+" /proc/drbd 2>/dev/null | grep -oE "[0-9:]+$" | head -1 || echo "")
   _spd=$(grep -oE "speed:[[:space:]]+[0-9,]+" /proc/drbd 2>/dev/null | grep -oE "[0-9,]+$" | head -1 || echo "")
   _sync_iter=$(( _sync_iter + 1 ))
   _sc="${_sync_chars[$_sync_iter % 4]}"
-
   if [[ -n "$_pct" ]]; then
-    _msg="  [${_sc}] syncing: ${_pct}% done — ETA ${_eta:-??:??:??} @ ${_spd:-?} K/s"
-    if $_is_tty; then
-      printf "\r%-80s" "$_msg"
-    elif [[ "$_pct" != "$_sync_last_pct" ]]; then
-      log "$_msg"
-      _sync_last_pct="$_pct"
-    fi
+    printf "\r  [%s] syncing: %s%% done — ETA %s @ %s K/s     " \
+      "$_sc" "$_pct" "${_eta:-??:??:??}" "${_spd:-?}"
   else
-    # /proc/drbd shows cs:SyncSource but no percent line yet — or something unexpected.
-    _msg="  [${_sc}] dstate: ${_dstate} — waiting for sync progress in /proc/drbd"
-    if $_is_tty; then
-      printf "\r%-80s" "$_msg"
-    elif (( _sync_iter % 5 == 1 )); then
-      log "$_msg"
-    fi
+    printf "\r  [%s] dstate: %s — waiting for sync progress     " "$_sc" "$_dstate"
   fi
   sleep 3
 done