Set up APScheduler for hourly execution

[Col20s]

Description:
Create scrapers/scheduler.py to run Scrapy spiders on hourly schedule.

Job:

• Every hour, trigger all 3 spiders
• Log job status
• Catch exceptions

Implementation:

from apscheduler.schedulers.background import BackgroundScheduler

scheduler = BackgroundScheduler()
scheduler.add_job(run_spiders, 'cron', hour='*', minute='0')
scheduler.start()

Acceptance Criteria:

• Scheduler runs without errors
• First run at top of hour confirmed
• Can verify via logs