feat(websoc-scraper): Dynamic Resolution for Enrollment History

[aadi-shanker]

Description

Implements variable-frequency enrollment snapshots based on academic calendar periods. The scraper now captures enrollment data at different frequencies depending on enrollment activity:

ENROLLMENT period (Week 8-10): Every 3 hours, 7am-7pm only (~5 snapshots/day)
ADD_DROP period (Week 1-2): Every 6 hours 24/7, with hourly snapshots on Week 2 Friday 12pm-5pm (~4-8 snapshots/day)
REGULAR period (Week 3-7): Once per week (168 hours)
Between quarters: Once per week for late enrollment

Database-driven frequency tracking checks hours elapsed since the last snapshot and only inserts when thresholds are met. This prevents missed snapshots during scraper outages (self-correcting behavior) while optimizing storage usage.

Related Issue

#134

Motivation and Context

Missing intraday enrollment trends -Want to increase and visualize hourly changes during critical periods

How Has This Been Tested?

I ran a test file with multiple detection unit tests based on given fake dates. I also ran the scraper using fake dates just to double check the processing logic is correct.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code involves a change to the database schema.
• My code requires a change to the documentation.

[ParzivalPerhaps]

Aadi owes me $10,000

lgtm

[laggycomputer]

This is fine for now, but there are a lot of small constants which will eventually live here.

[laggycomputer]

Good to go, but I will not approve so that merging is blocked while we do our deployment to a separate worker.