Stage C is the implementation and testing via realistic crawling of more sophisticated revisit heuristics.

Plan: implement smarter revisit scheduling

• allow different revisit min/max for different sites and URL patterns
• implement simple exponential grow/decay in reaction to observed change
• implement additional HTTP header-based heuristics

Issue: Monitoring progress/coverage & operator adjustments

• extend queue dynamic analysis to provide warnings if target visitation rates unattainable
• add UI for viewing queue progress rates/expected finish times
• provide bulk queue edit/reschedule operations

Plan: run 'concrete scenario' for 3 months+

• use to evaluate performance & usability