fix: install bun to /usr/local/bin so it persists when /root is PVC-mounted

entrypoint-devpod.sh

@@ -16,7 +16,7 @@ fi
 if [ ! -f /root/.bashrc ]; then
   cp /etc/skel/.bashrc /root/.bashrc 2>/dev/null || true
   cat >> /root/.bashrc <<'EOF'
-export PATH="/root/.bun/bin:$PATH"
+export PATH="/usr/local/bin:$PATH"
 export HISTFILE=/root/.bash_history
 export HISTSIZE=10000
 EOF
@@ -24,7 +24,7 @@ fi
 
 if [ ! -f /root/.profile ]; then
   cat > /root/.profile <<'EOF'
-export PATH="/root/.bun/bin:$PATH"
+export PATH="/usr/local/bin:$PATH"
 [ -f /root/.bashrc ] && . /root/.bashrc
 EOF
 fi