-- Nachklang e.V. Feedback module — adds a per-event poster image URL.
-- Apply manually against the FEEDBACK_DB database, after 001_init.sql:
--   mysql -h <DB_HOST> -u <DB_USER> -p <FEEDBACK_DB> < 002_add_poster_image_url.sql
--
-- Stores a URL only (e.g. an existing nachklang.art poster image) rather
-- than an uploaded file — the concert posters already live on the public
-- website, so there is no need for the feedback app to host its own copy.
ALTER TABLE events
    ADD COLUMN poster_image_url VARCHAR(500) NULL AFTER intro_text;