feat(reader): add grouped reading progress routes

Add GET and PUT /reading-progress and DELETE /reading-progress/:fileId: positions grouped by
kind, up to 25 files saved in one request, and an optional editedAt so the server keeps the newer
of two saves. Move the web reader and book page to them, and list reading-progress in
SERVER_FEATURES for the iOS and Android apps, which adopt the routes in the same release.

server/test/e2e/authorization-matrix/route-inventory/manifest.json

@@ -1,7 +1,7 @@
 {
-  "totalRoutes": 701,
+  "totalRoutes": 704,
   "byPermission": {
-    "(none)": 294,
+    "(none)": 297,
     "Permission.ManageMetadataConfig": 41,
     "Permission.EmailSend": 34,
     "Permission.LibraryEditMetadata": 54,

server/test/e2e/authorization-matrix/route-inventory/routes-10.json

@@ -1210,5 +1210,41 @@
     "isPublic": false,
     "allowDefault": false,
     "useGuards": []
+  },
+  {
+    "file": "server/src/modules/book/reading-progress.controller.ts",
+    "className": "ReadingProgressController",
+    "methodName": "list",
+    "httpMethod": "GET",
+    "path": "/reading-progress",
+    "permissions": [],
+    "libraryAccess": [],
+    "isPublic": false,
+    "allowDefault": false,
+    "useGuards": []
+  },
+  {
+    "file": "server/src/modules/book/reading-progress.controller.ts",
+    "className": "ReadingProgressController",
+    "methodName": "save",
+    "httpMethod": "PUT",
+    "path": "/reading-progress",
+    "permissions": [],
+    "libraryAccess": [],
+    "isPublic": false,
+    "allowDefault": false,
+    "useGuards": []
+  },
+  {
+    "file": "server/src/modules/book/reading-progress.controller.ts",
+    "className": "ReadingProgressController",
+    "methodName": "clear",
+    "httpMethod": "DELETE",
+    "path": "/reading-progress/:fileId",
+    "permissions": [],
+    "libraryAccess": [],
+    "isPublic": false,
+    "allowDefault": false,
+    "useGuards": []
   }
 ]