[FEATURE REQUEST] Export events information to Redis

[LdDl]

Is your feature request related to a problem? Please describe.
Currently only aggregated statistics could be exported to Redis.
I'd like to see a optional export of detection events in such form:

{
"event_id": some unique ID (e.g. UUID v4),
"event_time": UnixTimestamp or RFC3339 o ISO8601
"class_id": ID of class (or may be label? Need to investigate common needs)
"bbox": bounding box corresponding to real image size
"speed": estimated speed
"control_zone": ID of control zone or just rectangle or all zone parameters?
"virtual_line": Parameters of virtual line (#16)?
"track": Set of points corresponding to real image coordinates before image resizing (same as bbox)
"timestamps": UnixTimestamps correspondings to set of points in track
}

Additional context
Before implementation need to deeply consider event data.
Should we just register only crossing zone events (so filter any random detection) or any object detection (probably overkill)?

[LdDl]

There is Redis drama.
No matter what I think it is need to be implemented anyways, but after #16 (since we can met breaking changes)