Generalizes exabgp/startup.sh to template BGP neighbors from an EXABGP_PEERS
list (ip:peer_as:description), so ExaBGP peers with multiple labs. Adds
cml/proxmox_bmp_config.py to apply the bmp server block to a lab's IOS-XR
routers over SSH (BMP config is not exposed via NETCONF YANG on current XR).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
