#5470 "pysnmp-lextudio is deprecated: every startup logs a RuntimeWarning". Dependency change: the [snmp] extra now installs `pysnmp>=7.1` instead of `pysnmp-lextudio>=6.2`. pysnmp is the same lextudio lineage under its maintained name; the 7.1 floor is because below 7 the name is the abandoned 4.x line with no asyncio API. The poller already finds either API shape (_api(), the engine close probes), so no code changes; its docstring now names what the image ships. Approved by the operator 2026-10-09 ("yes please do the swap"). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>