feat: central traits

[parametalol]

Description

Added traits column to the central_requests table, which may hold an array of strings.

API:

• show instance traits: GET /v1/admin/centrals/<id>/traits
• check if an instance has a trait: GET /v1/admin/centrals/<id>/traits/<trait>
• add a trait: PATCH /v1/admin/centrals/<id>/traits/<trait>
• delete a trait: DELETE /v1/admin/centrals/<id>/traits/<trait>

Filtering instances by their traits will be implemented with the "class" API. Altering the search functionality may be too cumbersome at this point.

Checklist (Definition of Done)

• Unit and integration tests added
• Added test description under Test manual
• Documentation added if necessary (i.e. changes to dev setup, test execution, ...)
• CI and all relevant tests are passing
• Add the ticket number to the PR title if available, i.e. ROX-12345: ...
• Discussed security and business related topics privately. Will move any security and business related topics that arise to private communication channel.
• Add secret to app-interface Vault or Secrets Manager if necessary
• RDS changes were e2e tested manually
• Check AWS limits are reasonable for changes provisioning new resources

Test manual

$ CENTRAL="http://localhost:8000/api/rhacs/v1/admin/centrals/cl75fu8bs0bd6k334h0g"
$ curl -H $AUTH "$CENTRAL/traits" 
$ curl -H $AUTH "$CENTRAL/traits/trait1" -X PATCH
$ curl -H $AUTH "$CENTRAL/traits"
["trait1"]
$ curl -H $AUTH "$CENTRAL/traits/trait1" --fail && echo OK
OK
$ curl -H $AUTH "$CENTRAL/traits/trait2" --fail && echo OK
curl: (22) The requested URL returned error: 404
$ curl -H $AUTH "$CENTRAL/traits/trait2" -X PATCH
$ curl -H $AUTH "$CENTRAL/traits"
["trait1","trait2"]
$ curl -H $AUTH "$CENTRAL/traits/trait1" -X PATCH
$ curl -H $AUTH "$CENTRAL/traits"
["trait1","trait2"]
$ curl -H $AUTH "$CENTRAL/traits" -X DELETE
$ curl -H $AUTH "$CENTRAL/traits"
["trait2"]
$ curl -H $AUTH "$CENTRAL" -s | jq '.traits'
[
  "trait2"
]

# To run tests locally run:
make db/teardown db/setup db/migrate
make ocm/setup OCM_OFFLINE_TOKEN=<ocm-offline-token> OCM_ENV=development
make verify lint binary test test/integration