chore: enable debug features and improve graceful shutdown for unstable builds

Adds stack overflow backtraces, debug info compilation, and SSH password
auth for development. Reduces shutdown timeouts from 60s to 100ms for
faster iteration. Fixes race condition in NetService cleanup.

build/image-recipe/build.sh

@@ -131,6 +131,11 @@ ff02::1         ip6-allnodes
 ff02::2         ip6-allrouters
 EOT
 
+if [[ "${IB_OS_ENV}" =~ (^|-)dev($|-) ]]; then
+	mkdir -p config/includes.chroot/etc/ssh/sshd_config.d
+	echo "PasswordAuthentication yes" > config/includes.chroot/etc/ssh/sshd_config.d/dev-password-auth.conf
+fi
+
 # Installer marker file (used by installed GRUB to detect the live USB)
 mkdir -p config/includes.binary
 touch config/includes.binary/.startos-installer

build/image-recipe/raspberrypi/img/usr/lib/startos/scripts/init_resize.sh

@@ -58,6 +58,11 @@ check_variables () {
 main () {
   get_variables
 
+  # Fix GPT backup header first — the image was built with a tight root
+  # partition, so the backup GPT is not at the end of the SD card. parted
+  # will prompt interactively if this isn't fixed before we use it.
+  sgdisk -e "$ROOT_DEV" 2>/dev/null || true
+
   if ! check_variables; then
     return 1
   fi
@@ -74,9 +79,6 @@ main () {
     fi
   fi
 
-  # Fix GPT backup header to reflect new partition layout
-  sgdisk -e "$ROOT_DEV" 2>/dev/null || true
-
   mount / -o remount,rw
 
   btrfs filesystem resize max /media/startos/root