feat(audiobooks): migrations 154 + 155 for Phase 1 close-out

154 adds hide_from_continue to user_watch_progress (backs the
ABS remove/readd-to-continue-listening endpoints). 155 creates
abs_rss_feeds for the upcoming RSS surface.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

migrations/154_user_watch_progress_hide_from_continue.down.sql

@@ -0,0 +1,2 @@
+ALTER TABLE public.user_watch_progress
+    DROP COLUMN IF EXISTS hide_from_continue;

migrations/154_user_watch_progress_hide_from_continue.up.sql

@@ -0,0 +1,7 @@
+-- Toggle for hiding an in-progress book from the Continue Listening
+-- shelf without affecting the progress row itself. Used by the
+-- ABS-compat /me/progress/{itemId}/remove-from-continue-listening +
+-- /readd-to-continue-listening endpoints.
+
+ALTER TABLE public.user_watch_progress
+    ADD COLUMN IF NOT EXISTS hide_from_continue boolean NOT NULL DEFAULT false;

migrations/155_abs_rss_feeds.down.sql

@@ -0,0 +1,3 @@
+DROP INDEX IF EXISTS public.abs_rss_feeds_user_profile_idx;
+DROP INDEX IF EXISTS public.abs_rss_feeds_slug_uniq;
+DROP TABLE IF EXISTS public.abs_rss_feeds;

migrations/155_abs_rss_feeds.up.sql

@@ -0,0 +1,25 @@
+-- Audiobookshelf-style RSS podcast feeds. Each row exposes one
+-- audiobook (library_item_id) as a public RSS XML feed reachable at
+-- /feed/{slug}.xml — slug is the unguessable capability token.
+-- closed_at is NULL while the feed is active; closing soft-deletes
+-- so re-opening creates a new row with a new slug.
+
+CREATE TABLE IF NOT EXISTS public.abs_rss_feeds (
+    id              text PRIMARY KEY,
+    user_id         integer NOT NULL REFERENCES public.users(id) ON DELETE CASCADE,
+    profile_id      uuid,
+    library_item_id text NOT NULL REFERENCES public.media_items(content_id) ON DELETE CASCADE,
+    slug            text NOT NULL,
+    minified        boolean NOT NULL DEFAULT false,
+    created_at      timestamptz NOT NULL DEFAULT now(),
+    closed_at       timestamptz
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS abs_rss_feeds_slug_uniq
+    ON public.abs_rss_feeds (slug);
+
+CREATE INDEX IF NOT EXISTS abs_rss_feeds_user_profile_idx
+    ON public.abs_rss_feeds (
+        user_id,
+        COALESCE(profile_id, '00000000-0000-0000-0000-000000000000'::uuid)
+    );