fix(iso): restore loglevel=7 on VGA console for crash visibility

loglevel=3 was hiding all kernel messages on tty0/ttyS0 except errors.
Machine crashes (panics, driver oops, module failures) were silent on VGA.

Restored loglevel=7 so kernel messages up to debug are printed to both
tty0 (VGA) and ttyS0 (SOL). Journald MaxLevelConsole reduced to info
(was debug) to reduce noise on SOL while keeping it useful.

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

iso/builder/auto/config

@@ -32,6 +32,6 @@ lb config noauto \
     --memtest none \
     --iso-volume "EASY-BEE" \
     --iso-application "EASY-BEE" \
-    --bootappend-live "boot=live components console=tty0 console=ttyS0,115200n8 loglevel=3 username=bee user-fullname=Bee modprobe.blacklist=nouveau" \
+    --bootappend-live "boot=live components console=tty0 console=ttyS0,115200n8 loglevel=7 username=bee user-fullname=Bee modprobe.blacklist=nouveau" \
     --apt-recommends false \
     "${@}"

iso/overlay/etc/systemd/journald.conf.d/console-to-sol.conf

@@ -1,4 +1,4 @@
 [Journal]
 ForwardToConsole=yes
 TTYPath=/dev/ttyS0
-MaxLevelConsole=debug
+MaxLevelConsole=info