Score monitors have type='score' and ip_version=NULL, but the
GetMonitorByNameAndIPVersion query required ip_version to match.
This broke monitor lookups by name for score monitors.
Modified query to match either:
- Regular monitors with specified ip_version
- Score monitors with NULL ip_version
Fixes issue reported by Ben Harris at:
https://community.ntppool.org/t/monitor-recentmedian-no-longer-works/4002
Servers with monitor filtering returned incorrect results when monitors
have same names but different protocols (v4/v6). Monitor lookup now
considers both name and IP version to match the correct protocol.
- Add GetMonitorByNameAndIPVersion SQL query with protocol matching
- Update history parameter parsing to use server IP version context
- Fix both /scores/{ip}/log and Grafana endpoints
- Remove unused GetMonitorByName query
Fixesabh/ntppool#264
Reported-by: Anssi Johansson <https://github.com/avijc>
