PLAN 02 SUMMARY

What Was Built

• Per-source scrape rate limiting via min_scrape_interval column on sourcemon_sources
• Global default interval (1.0s) in ScrapingSettings with per-source override
• Enqueuer derives last-scrape from scrape_logs MAX(started_at), returns deferred status with re-enqueue
• ScrapeItemJob early rate limit check before scraping, re-enqueues with delay on deferral
• 9 new tests (6 Enqueuer + 3 ScrapeItemJob) covering all rate limit scenarios

Files Modified

• db/migrate/20260222120000_add_min_scrape_interval_to_sources.rb -- new migration
• test/dummy/db/schema.rb -- schema updated with min_scrape_interval column
• lib/source_monitor/configuration/scraping_settings.rb -- min_scrape_interval attr, DEFAULT, normalize_numeric_float
• lib/source_monitor/scraping/enqueuer.rb -- time_rate_limited?, deferred Result status, re-enqueue with delay
• app/jobs/source_monitor/scrape_item_job.rb -- time_until_scrape_allowed, early deferral check
• test/lib/source_monitor/scraping/enqueuer_test.rb -- 6 new time rate limiting tests
• test/jobs/source_monitor/scrape_item_job_test.rb -- 3 new time rate limiting tests