Add profiles data format

.textlintrc.yml

@@ -30,6 +30,7 @@ rules:
       - 'to-?do(s)?(?=[ ,.])'
       - "indexes\\b"
       - "repo\\b"
+      - 'KeyValue(?:AndUnit)?'
     terms:
       - Actix
       - Ajax

CHANGELOG.md

@@ -212,6 +212,9 @@ release.
 - Add event to span event bridge.
   ([#5006](https://github.com/open-telemetry/opentelemetry-specification/pull/5006))
 
+- Add Profiles data model (data-model.md).
+  ([#4965](https://github.com/open-telemetry/opentelemetry-specification/pull/4965))
+
 ### Resource
 
 - Clarify that a Resource describes the observed entity, not the component