feat(connect): scan audiobookshelf and call a webhook after changes

README.md

@@ -25,6 +25,9 @@ the same mount, otherwise moving turns into copy + delete.
 | `WORDARR_EXTRA_EBOOK_EXTENSIONS` | – | extra ebook formats the scan should offer, e.g. `.kepub,.lit,.rtf` |
 | `WORDARR_HARDCOVER_TOKEN` | – | Hardcover API token, the best ebook source; without it Hardcover is skipped |
 | `WORDARR_GOOGLE_BOOKS_KEY` | – | optional, only needed when the keyless Google Books quota runs dry |
+| `WORDARR_ABS_URL` | – | Audiobookshelf base URL, e.g. `http://audiobookshelf`; after an import, relocate or retag it scans the libraries whose folders hold the files, so both containers must mount them under the same path |
+| `WORDARR_ABS_TOKEN` | – | API token of an Audiobookshelf admin (only admins may start a scan) |
+| `WORDARR_WEBHOOK_URL` | – | gets every history row as JSON (`event`, `request_id`, `title`, `media_type`, `source`, `dest`, `message`) |
 | `WORDARR_BUILD` | – | shown next to the version, e.g. the git sha; also a build arg of the image |
 
 The header shows the running version and, behind it, the build stamp (the newest