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/app/api/setup/complete/route.ts

@@ -468,8 +468,6 @@ export async function POST(request: NextRequest) {
             provider: bookdate.provider,
             apiKey: encryptedApiKey,
             model: bookdate.model,
-            libraryScope: 'full', // Default value for backwards compatibility
-            customPrompt: null,
             isVerified: true,
             isEnabled: true,
           },
@@ -481,8 +479,6 @@ export async function POST(request: NextRequest) {
             provider: bookdate.provider,
             apiKey: encryptedApiKey,
             model: bookdate.model,
-            libraryScope: 'full', // Default value for backwards compatibility
-            customPrompt: null,
             isVerified: true,
             isEnabled: true,
           },