A host being PXE-discovered or installed is not in Kubernetes, so vlagent
cannot collect its logs and a failed install leaves no record; the installer
environment has no internal-CA trust or credentials for the HTTPS log ingest,
and bootapi is already the plain-HTTP broker it can reach.
- add POST /logs, token-guarded like POST /provisioned, relaying ndjson to
vlinsert's jsonline endpoint keyed on serial+phase
- stamp observed source IP and resolved NetBox device name into extra_fields
- return 202 on a sink failure so logs never block an install
- add BOOTAPI_VLINSERT_URL/_TIMEOUT and bootapi_log_relay metrics
unkin-agent