feat: improve session management and PM2 support in startup scripts (#22420)

New feature to manage service restart policies and refactors crash logging paths for better flexibility and clarity. The most significant changes include adding support for configurable restart policies (`on-failure` and `always`), updating documentation to reflect these changes, and improving crash path handling in multiple scripts.

apps/startup-scripts/src/starter

@@ -26,7 +26,7 @@ CRASHES_PATH="$8"
 
 # Default values
 CURRENT_PATH="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-DEFAULT_CRASHES_PATH="$CURRENT_PATH/logs/crashes"
+DEFAULT_CRASHES_PATH=$(realpath "$BINPATH/crashes")
 [ -n "$CONFIG" ] && CONFIG_ABS=$(realpath "$CONFIG")
 
 # Set defaults if not provided
@@ -121,20 +121,17 @@ EOF
         rm -f "$GDB_TEMP_FILE"
     fi
 else
-    # check if it's running under PM2 or `script` command does not exist
-    # Note: script is used to capture output in non-interactive sessions such as systemd (without tmux/screen)
-    # We use AC_LAUNCHED_BY_PM2 environment variable set by service-manager for robust PM2 detection
-    if [[ "$AC_LAUNCHED_BY_PM2" == "1" || ! -x "$(command -v script)" ]]; then
-        if [ -n "$CONFIG_ABS" ]; then
-            "$EXECPATH" -c "$CONFIG_ABS"
-        else
-            "$EXECPATH"
-        fi
+    echo "Starting $BINFILE without GDB"
+    if [[ "$AC_LAUNCHED_BY_PM2" == "1" ]]; then
+        echo "Running under PM2"
+        "$EXECPATH" ${CONFIG_ABS:+-c "$CONFIG_ABS"}
     else
-        if [ -n "$CONFIG_ABS" ]; then
-            script -q -e -c "$EXECPATH -c \"$CONFIG_ABS\""
+        if command -v unbuffer >/dev/null 2>&1; then
+            export AC_DISABLE_INTERACTIVE=0
+            unbuffer "$EXECPATH" ${CONFIG_ABS:+-c "$CONFIG_ABS"}
         else
-            script -q -e -c "$EXECPATH"
+            echo "⚠️  unbuffer not found, the output may not be line-buffered. Try installing expect."
+            exec "$EXECPATH" ${CONFIG_ABS:+-c "$CONFIG_ABS"}
         fi
     fi
-fi
+fi