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.

src/components/requests/InteractiveTorrentSearchModal.tsx

@@ -187,7 +187,7 @@ export function InteractiveTorrentSearchModal({
           {/* No results */}
           {!isSearching && results.length === 0 && (
             <div className="text-center py-12">
-              <p className="text-gray-500 dark:text-gray-400">No torrents found</p>
+              <p className="text-gray-500 dark:text-gray-400">No torrents/nzbs found</p>
               <Button onClick={performSearch} variant="outline" className="mt-4">
                 Try Again
               </Button>