Add skip-unreleased auto-search feature

Introduce an indexer-wide option to skip automatic searches for books with future release dates (config key: `indexer.skip_unreleased`, default ON). Adds a GET/PUT admin API for indexer options, a UI toggle on the Indexers settings tab (persisted on save), and persistence of a request-level releaseDate in the Prisma schema.

Adds a new request status `awaiting_release` and wires it through constants, UI components (StatusBadge, RequestCard, RecentRequestsTable, Audiobook card/modal, RequestActions), API request flows (bookdate swipe, request creation, manual search, request PATCHs, request listing groups), and services. Implements a pure release-date utility (isUnreleased / shouldSkipAutoSearch) and updates background processors: monitor-rss-feeds (skip matches but do not mutate status), retry-missing-torrents (drives bidirectional transitions between awaiting_search and awaiting_release and queues searches when appropriate), and request-creator/bookdate swipe (gate initial auto-search). Adds tests for the swipe gate and other related test updates. Logs transitions and gate decisions for observability.

documentation/backend/database.md

@@ -60,12 +60,14 @@ PostgreSQL database storing users, audiobooks, requests, downloads, configuratio
 
 ### Requests
 - `id` (UUID PK), `user_id` (FK), `audiobook_id` (FK)
-- `status` ('pending'|'searching'|'downloading'|'processing'|'downloaded'|'available'|'failed'|'cancelled'|'awaiting_search'|'awaiting_import'|'warn'|'awaiting_approval'|'denied')
+- `status` ('pending'|'searching'|'downloading'|'processing'|'downloaded'|'available'|'failed'|'cancelled'|'awaiting_search'|'awaiting_import'|'awaiting_release'|'warn'|'awaiting_approval'|'denied')
   - **Approval flow:** awaiting_approval → (approve) → pending → searching → downloading → processing → downloaded → available
   - **Denial flow:** awaiting_approval → (deny) → denied
   - **awaiting_approval** - Request pending admin approval (only if auto-approve disabled)
   - **denied** - Request rejected by admin (terminal state)
   - **pending** - Request approved and queued for processing
+  - **awaiting_release** - Book has a future release date; auto-search skipped until release (admin toggle controls behavior)
+- `release_date` (Date, nullable) - Book release date snapshot from Audnexus at request creation; used by skip-unreleased-auto-search gate
 - `progress` (0-100), `priority`, `error_message`
 - `search_attempts`, `download_attempts`, `import_attempts`, `max_import_retries` (default 5)
 - `last_search_at`, `last_import_at`, `created_at`, `updated_at`, `completed_at`

documentation/backend/services/jobs.md

@@ -48,6 +48,7 @@ Manages background job queue using Bull (Redis-backed) for async tasks: searchin
 **search_indexers:**
 - No torrents found → 'awaiting_search' status (not failed)
 - Allows automatic retry via scheduled job
+- Upstream release-date gate: 4 enqueue sites (`request-creator.service`, `retry-missing-torrents.processor`, `monitor-rss-feeds.processor`, `bookdate/swipe/route`) check `shouldSkipAutoSearch` against `indexer.skip_unreleased`; gated requests are created/kept in `awaiting_release` and `addSearchJob` is not called. Manual search bypasses the gate.
 
 **organize_files:**
 - No audiobook files found → 'awaiting_import' status

documentation/backend/services/scheduler.md

@@ -18,10 +18,10 @@ Manages recurring/scheduled jobs providing automated tasks (Plex scans, Audible
 1. **plex_library_scan** - Default: every 6 hours, full library scan, disabled by default (enable after setup)
 2. **plex_recently_added_check** - Default: every 5 minutes, lightweight polling of top 10 recently added items, enabled by default
 3. **audible_refresh** - Default: daily midnight, fetches 200 popular + 200 new releases, stores with rankings, disabled by default
-4. **retry_missing_torrents** - Default: daily midnight, re-searches 'awaiting_search' status (limit 50), handles both audiobook and ebook requests, enabled by default
+4. **retry_missing_torrents** - Default: daily midnight, processes union of `awaiting_search` ∪ `awaiting_release` (limit 50), handles both audiobook and ebook requests. Bidirectional transitions: `awaiting_search` → `awaiting_release` when release date is future + `indexer.skip_unreleased` ON; `awaiting_release` → `awaiting_search` + run search when release date has passed or setting OFF. Sole owner of these transitions. Enabled by default.
 5. **retry_failed_imports** - Default: every 6 hours, re-attempts 'awaiting_import' status (limit 50), enabled by default
 6. **cleanup_seeded_torrents** - Default: every 30 mins, deletes torrents after seeding requirements met, respects `seeding_time_minutes` config (0 = never), enabled by default
-7. **monitor_rss_feeds** - Default: every 15 mins, checks RSS feeds from enabled indexers, matches against 'awaiting_search' requests (audiobook and ebook, limit 100), triggers appropriate search jobs for matches, enabled by default
+7. **monitor_rss_feeds** - Default: every 15 mins, checks RSS feeds from enabled indexers, matches against `awaiting_search` requests (audiobook and ebook, limit 100). Query is unchanged — release-date gate is applied AFTER a match is found: if matched book is unreleased + `indexer.skip_unreleased` ON, the match is skipped and request status is NOT mutated (retry job owns transitions). Enabled by default.
 
 ## Architecture: Bull + Cron