<!--- Provide a general summary of your changes in the Title above -->

## Description

Introduces a new "websocSectionEnrollmentLive" table to the schema,
purposed to keep track of updated enrollment data based on continuous
scrapes.

Updated the websoc scraper to populate new table every 5 minutes. The
table holds short term data, clearing out all entries older than an hour
every scrape.

Added REST endpoint functionality for the new table, which retrieves
enrollment snapshots based on a `since` timestamp.
  - The API returns:
- A "from" snapshot representing the latest known state before `since`
(if available).
    - A "to" snapshot representing the latest known state.
    - If no significant changes are detected, only "to" is returned.

## Related Issue

Closes [#59]

## Motivation and Context

Allows developers to create accurate applications of UCI's enrollment
information, helping student's quarterly enrollment processes go
smoother and be more communicative.

## How Has This Been Tested?

the schema and scraper were tested across numerous scapes in 5 minute
intervals, and the data was validated for consistency.

## Screenshots (if appropriate):

## Types of changes

<!--- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->

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

## Checklist:

- [X] My code involves a change to the database schema.
- [ ] My code requires a change to the documentation.

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Co-authored-by: Sanskar Mishra <[email protected]>
Co-authored-by: Jordan <[email protected]>
Co-authored-by: Jordan Yee <[email protected]>
Co-authored-by: Dante Dam <[email protected]>
Co-authored-by: Andrew Wang <[email protected]>