Add last_scan as a new way to fetch some syscollector API calls

[jesusgn90]

Hi team,

What I meant is that it would be nice to have a way to know the date from the last scan for a specific syscollector route.

How to know the last scan date for /syscollector/:agent/processes ?

GET /syscollector/:agent/processes
{
   limit: 1,
   select: 'scan_time'
}

This applies to more API calls such /syscollector/:agent/packages.

That's my way now, but I think there are better ways to know that information.

Regards!