Document outlook v2 behavior

docs/internal/http-adapter.md

@@ -144,6 +144,11 @@ application service:
 The package variable `outlookNow` exists so endpoint tests can make active and
 location filtering deterministic.
 
+The application service returns filtered outlook copies and trims run-level
+discussions to days represented by retained outlooks.
+`/outlooks/convective/location` is retained for compatibility and active
+local-outlook behavior under the weatherfeeder outlook v2 contract.
+
 ## Failure Behavior
 
 Binder failures become feedapi invalid-parameter responses. Handler service