[BUG] Best Practice - missing `self` link

[lowlydba]

Lint: Catalog/collection objects should include a self link

Description

One or more catalog or collection objects are missing a self link. The STAC spec strongly recommends a self link on every object so clients can resolve the canonical URL without relying on context from a parent.

Lint message

Best practice: A link to 'self' in links is strongly recommended

Affected objects

Catalog and/or collection JSON files that omit a { "rel": "self", "href": "..." } entry in their links array.

Recommended fix

Add a self link pointing to the object's canonical (absolute) URL:

{
  "rel": "self",
  "href": "https://example.com/stac/catalog.json",
  "type": "application/json"
}