optimize the long running clearmash download pipelines

[OriHoch]

download and download_related pipelines might take a long time to run (for the first time)

this is problematic because:

• have to wait a long time until you see result
• if it fails, everything fails
• it overloads the DB
• if there are more urgent items coming in while it's running - have to wait for it to complete

the solution:

• use the time delay processor (see Update delay_limit #85) in combination with the schedule - to limit processors running times.
• change the dump.to_sql processor to a version that updates and commits every few rows (as opposed to committing all at the end)

[OriHoch]

• clearmash/download-entities - 5 minutes
• clearmash/download-related-entities - 1.5 hours
• clearmash/entities-delete - 5 minutes
• clearmash/entities-sync - <1 minute
• clearmash/entity-ids - 5 minutes

[OriHoch]

according to last run times above - it's not critical