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.

tests/app/admin/settings/lib/helpers.test.ts

@@ -40,6 +40,7 @@ const baseSettings = {
   },
   registration: { enabled: true, requireAdminApproval: false },
   prowlarr: { url: 'http://prowlarr', apiKey: 'key' },
+  indexerOptions: { skipUnreleased: true },
   downloadClient: {
     type: 'qbittorrent',
     url: 'http://qb',
@@ -275,6 +276,7 @@ describe('admin settings helpers', () => {
 
   it('saves prowlarr settings with enabled indexers and flag configs', async () => {
     fetchWithAuthMock
+      .mockResolvedValueOnce(makeOk())
       .mockResolvedValueOnce(makeOk())
       .mockResolvedValueOnce(makeOk());
 
@@ -289,6 +291,16 @@ describe('admin settings helpers', () => {
     const body = JSON.parse((fetchWithAuthMock.mock.calls[1][1] as RequestInit).body as string);
     expect(body.indexers[0].enabled).toBe(true);
     expect(body.flagConfigs).toHaveLength(1);
+
+    // Indexer options PUT goes last in the prowlarr tab save flow.
+    expect(fetchWithAuthMock).toHaveBeenCalledWith(
+      '/api/admin/settings/indexer-options',
+      expect.objectContaining({ method: 'PUT' })
+    );
+    const optionsBody = JSON.parse(
+      (fetchWithAuthMock.mock.calls[2][1] as RequestInit).body as string
+    );
+    expect(optionsBody.skipUnreleased).toBe(true);
   });
 
   it('saves download and paths settings', async () => {