Fix: set context (vessel) prune interval to 1 hour
Fix: set context (vessel) prune interval to 1 hour

For some reason it was ~117 hours, with pruneContexts expecting seconds and getting
7 * 60 * 1000, which clearly is a mistake.

SignalK/signalk-server-node,SignalK/signalk-server-node,webmasterkai/signalk-server-node,SignalK/signalk-server-node,SignalK/signalk-server-node,sbender9/signalk-server-node,sbender9/signalk-server-node,webmasterkai/signalk-server-node,sbender9/signalk-server-node,webmasterkai/signalk-server-node