fix: use %pre instead of %post for debug --sshd (rescue mode skips %post)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

bastion/src/bastion/src/templates/debug.ks.ts

@@ -17,10 +17,17 @@ export function renderDebugKickstart(params: DebugKickstartParams): string {
     : "";
 
   const sshdSetup = params.sshd ? `
-%post --nochroot --log=/tmp/debug-sshd.log
+%pre --log=/tmp/debug-sshd.log
 #!/bin/bash
 set -x
 
+# Wait for network to come up
+for i in $(seq 1 30); do
+    IP_ADDR=$(ip -4 addr show | awk '/inet / && !/127.0.0/ {split($2,a,"/"); print a[1]; exit}')
+    [ -n "$IP_ADDR" ] && break
+    sleep 1
+done
+
 # Generate host keys (self-contained, no mounted FS needed)
 ssh-keygen -t ed25519 -f /tmp/ssh_host_ed25519_key -N "" -q
 ssh-keygen -t rsa -f /tmp/ssh_host_rsa_key -N "" -q
@@ -52,8 +59,6 @@ echo "sshd started on port 22"
 echo "nc shell listener on port 2323"
 
 # Report IP to bastion
-sleep 2
-IP_ADDR=$(ip -4 addr show | awk '/inet / && !/127.0.0/ {split($2,a,"/"); print a[1]; exit}')
 MAC_ADDR=$(ip link show | awk '/ether/ && !/00:00:00:00/ {print $2; exit}')
 curl -sf -X POST "http://${params.serverIp}:${params.httpPort}/api/progress" \\
     -H "Content-Type: application/json" \\