Replaces agent-supplied timestamps with server-side DateTime.utc_now()
to prevent clock drift issues between agents from causing weird graphs.
All metrics now use consistent server time regardless of polling method:
- Agent polling (via WebSocket): server time on receipt
- Phoenix polling (direct SNMP): server time on poll (already correct)
This ensures time-series data aligns correctly when graphing metrics
from devices polled by different agents with potentially different
system clocks.
mayor
f17ee2183c