api/timeline/hashtag: allow pagination params in spec

Otherwise they get stripped and ignored.

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## Unreleased
+
+### Fixed
+- fix pagination parameters being ignored on hashtag timelines
+
 ## 2026.03
 
 ### BREAKING

lib/pleroma/web/api_spec/operations/timeline_operation.ex

@@ -128,6 +128,7 @@ defmodule Pleroma.Web.ApiSpec.TimelineOperation do
         only_media_param(),
         remote_param(),
         with_muted_param()
+        | pagination_params()
       ],
       operationId: "TimelineController.hashtag",
       responses: %{