[Event] Affiliations

[Luke-Oldenburg]

We were previously missing a reliable way to store metadata regarding orgs such as team numbers and forced to use a combination of Airtable, organization names, tags, and comments. Now we can track this info inside of affiliations. Organizations can self report information for us and we will also have to backfill for previous organizations. We are starting with affiliations for FIRST, VEX, and Hack Clubs.
Closes #10552

[Copilot]

Pull Request Overview

This PR introduces a new Event::Affiliation model to store organization metadata such as team numbers for events. This replaces the previous approach of using a combination of Airtable, organization names, tags, and comments.

Key changes:

• Adds Event::Affiliation model with metadata stored as JSONB
• Implements affiliation management UI for FIRST, VEX, and Hack Club organizations
• Creates controller and policy for affiliation CRUD operations

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
db/schema.rb	Adds event_affiliations table with event reference, metadata JSONB, and name fields
db/migrate/*.rb	Creates migration files for event_affiliations table and null constraints
config/routes.rb	Adds affiliations resource routes under events
app/views/events/settings/_affiliations.html.erb	Creates main affiliations management UI
app/views/events/settings/_affiliation_form.html.erb	Creates form for adding/editing affiliations
app/views/events/edit.html.erb	Integrates affiliations tab into event settings
app/policies/event/affiliation_policy.rb	Implements authorization policy for affiliation management
app/models/event/affiliation.rb	Defines Affiliation model with metadata accessors and type helpers
app/models/event.rb	Adds has_many association to affiliations
app/controllers/events_controller.rb	Loads affiliations data for settings tab
app/controllers/event/affiliations_controller.rb	Implements CRUD operations for affiliations

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[sampoder]

PR is looking really good! just a few things to do