handle edge case in Pool package

[Intizar-T]

pool package is designed to run multiple goroutines at request. aggregator and accumulator starts a pool worker every 400 and 250ms, respectively. In both cases workers write data to redis and postgres db.

As an average case, we don't expect any race condition. But as an edge case, we might end up with:

• multiple workers running simultaneously
• the latest workers write to db first
• followed by the earlier workers in which case the db will end up with outdated data

[Intizar-T]

Pool package currently is not being used. It should be removed completely if it wont be used after adding 100 pairs.