Phase 1 Context: Install Generator Steps

User Vision

Enhance the install generator to automatically handle the two most common Solid Queue setup failures in host apps: missing Procfile.dev jobs entry and missing recurring_schedule dispatcher wiring.

Essential Features

• Generator creates Procfile.dev if missing (with web: and jobs: entries)
• Generator patches existing Procfile.dev to add jobs: entry (idempotent)
• Generator patches config/queue.yml dispatcher with recurring_schedule: config/recurring.yml
• Both steps integrated into the guided Setup::Workflow

Technical Preferences

• Procfile.dev: Always create/patch -- maximum hand-holding. Create if missing, patch if exists.
• Queue config: Target config/queue.yml (Rails 8 default). Don't worry about legacy solid_queue.yml naming.
• Follow existing generator patterns (idempotent, skip-if-present, say_status output)

Boundaries

• Don't modify any other config files (cable.yml, database.yml, etc.)
• Don't modify the initializer template
• Don't change existing generator steps (routes, initializer, recurring.yml)
• Don't add verification logic here (that's Phase 2)

Acceptance Criteria

• bin/rails generate source_monitor:install creates Procfile.dev with web: + jobs: when none exists
• bin/rails generate source_monitor:install adds jobs: line to existing Procfile.dev without duplicating
• bin/rails generate source_monitor:install adds recurring_schedule to queue.yml dispatcher
• bin/source_monitor install (guided) runs both new steps
• All existing generator tests still pass
• New tests cover: fresh Procfile.dev, existing with entry, existing without entry, missing queue.yml

Decisions Made

• Create Procfile.dev if missing (not just warn)
• Target config/queue.yml only (Rails 8 default), not solid_queue.yml