fix(koreader): keep manual links to a different copy matched and suggest links

Report a linked copy whose bytes differ from the library file as positionIncompatible instead of
unmatched, so the plugin keeps the match, skips highlights without a failure and still syncs progress.
Treat a position-less place within a page as the same place and jump to the nearest page.
Suggest library books with the same title and authors for books to review, with bulk linking.
See docs/KOREADER_HASH_MATCHING.md.

Closes #1872
Closes #1919

server/test/e2e/authorization-matrix/route-inventory/uncovered-routes.json

@@ -109,6 +109,7 @@
   "GET /koreader/plugin/version",
   "GET /koreader/syncs/progress/:document",
   "GET /koreader/unmatched-books",
+  "GET /koreader/unmatched-books/suggestions",
   "GET /koreader/users/auth",
   "GET /libraries/:id|:libraryId",
   "GET /libraries/:id|:libraryId/access",

server/test/kobo-koreader-download.e2e-spec.ts

@@ -419,7 +419,10 @@ describe('Kobo download identity in KOReader (e2e)', { timeout: 180_000 }, () =>
     await ctx.db.insert(schema.koreaderBookHashLinks).values({ userId: user.userId, hash: deliveredHash, bookFileId: other.bookFileId });
     try {
       expect((await download()).statusCode).toBe(200);
-      expect((await match(deliveredHash)).matches).toEqual([{ hash: deliveredHash, bookId: other.bookId, bookFileId: other.bookFileId }]);
+      // The delivered bytes belong to the source book, so the linked file cannot place their positions.
+      expect((await match(deliveredHash)).matches).toEqual([
+        { hash: deliveredHash, bookId: other.bookId, bookFileId: other.bookFileId, positionCompatible: false },
+      ]);
       const response = await ctx.app.inject({
         method: 'PUT',
         url: '/api/v1/koreader/syncs/progress',