Composer engine feedback and polishing

Ensure correct ElasticSearch indexing (!465 (01802c74))
Post scheduler not working correctly for short timeframes (!465 (08acfaf2)) - Reduced to 2 minutes.
Limit combined hashtags to 5 (!465 (dc6b5082); !465 (4c28f744))

Edited Mar 19, 2020 by Emiliano Balbuena