Move Favicon Cooldown to Source Model

What Was Built

Added Source#clear_favicon_cooldown! instance method to move business logic from controller to model. Updated SourceFaviconFetchesController to use model method.

Commits

• 133d87e refactor(models): move favicon cooldown logic from controller to Source model

Tasks Completed

1. Added 4 unit tests for Source#clear_favicon_cooldown! (key present, key absent, empty metadata, preserving other keys)
2. Added clear_favicon_cooldown! to Source model using metadata.except with update_column
3. Updated SourceFaviconFetchesController to call @source.clear_favicon_cooldown! and removed private method
4. Verified 42 related tests pass

Files Modified

• app/models/source_monitor/source.rb
• app/controllers/source_monitor/source_favicon_fetches_controller.rb
• test/models/source_monitor/source_test.rb

Deviations

• Plan called for "nil metadata" test but DB has NOT NULL constraint on metadata; tested empty hash instead.