feat: new affiliate collection

[kernelwhisperer]

Summary

Implements

• https://linear.app/cowswap/issue/COW-142/implement-affiliate-code-creation-flow
• https://linear.app/cowswap/issue/COW-147/adjustable-program-parameters

Adds a new collection called affiliate, when you create codes through the admin UI in Strapi CMS the empty fields are filled with our preset defaults on save. Additionally you can enable or disable a code.

Security

we must make sure the collection is not readable without an api key. Reads and writes by the FE will be done via a BFF service.

Testing

1. nvm use 20
2. Run yarn dev
3. Add codes directly in CMS admin
4. Ensure only enabled can be changed, the rest are immutable.

The reason for this is to make the accounting simpler, for new params new codes must be created.

[Copilot]

Pull request overview

This PR implements a new affiliate collection and API endpoints to support the affiliate code creation flow. The implementation includes schema definition, API routes, controllers, services, validation logic, and configuration for default affiliate program parameters.

Changes:

• Added new /affiliates API endpoints with full CRUD operations
• Implemented affiliate lifecycle hooks with validation for code format, wallet addresses, and program parameters
• Added configuration support for affiliate program defaults via environment variables

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
src/gen/types.ts	Generated TypeScript types for affiliate and restricted token list API endpoints
src/api/affiliate/services/affiliate.ts	Strapi service factory for affiliate collection
src/api/affiliate/routes/affiliate.ts	Strapi router factory for affiliate endpoints
src/api/affiliate/documentation/1.0.0/affiliate.json	OpenAPI documentation for affiliate endpoints
src/api/affiliate/controllers/affiliate.ts	Strapi controller factory for affiliate operations
src/api/affiliate/content-types/affiliate/schema.json	Database schema defining affiliate collection structure
src/api/affiliate/content-types/affiliate/lifecycles.ts	Lifecycle hooks with validation logic for affiliate creation and updates
config/affiliate.ts	Configuration file for affiliate program default parameters

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[alfetopito]

Looks good, just one comment regarding the code length.

Additionally, can you improve the description a bit, with some screenshots and explanation of the feature?

[shoom3301]

A couple of code style nitpicks