Implement file hash-based library matching and remove fuzzy ASIN matching

Adds file hash-based matching for Audiobookshelf library items to ensure 100% accurate ASIN assignment for RMAB-organized content. Removes fuzzy matching from library availability checks, making all matching ASIN-only to eliminate false positives and race conditions. Updates database schema, processors, and matcher utilities; adds new tests and documentation for the new matching strategy. Removes obsolete scripts, Dockerfile, and related tests; updates docker-compose for test environments.

tests/api/audiobooks-search.routes.test.ts

@@ -64,7 +64,7 @@ describe('Audiobooks search torrents route', () => {
   it('returns ranked results with rank order', async () => {
     authRequest.json.mockResolvedValue({ title: 'Title', author: 'Author' });
     configServiceMock.get
-      .mockResolvedValueOnce(JSON.stringify([{ id: 1, name: 'Indexer', priority: 10 }]))
+      .mockResolvedValueOnce(JSON.stringify([{ id: 1, name: 'Indexer', protocol: 'torrent', priority: 10 }]))
       .mockResolvedValueOnce(null);
 
     groupIndexersMock.mockReturnValue([{ categories: [1], indexerIds: [1] }]);