feat: add reading_status_push job — differential push to AniList

Push reading statuses (PLANNING/CURRENT/COMPLETED) to AniList for all
linked series that changed since last sync, or have new books/no sync yet.

- Migration 0057: adds reading_status_push to index_jobs type constraint
- Migration 0058: creates reading_status_push_results table (pushed/skipped/no_books/error)
- API: new reading_status_push module with start_push, get_push_report, get_push_results
- Differential detection: synced_at IS NULL OR reading progress updated OR new books added
- Same 429 retry logic as reading_status_match (wait 10s, retry once, abort on 2nd 429)
- Notifications: ReadingStatusPushCompleted/Failed events
- Backoffice: push button in reading status group, job detail report with per-series list
- Replay support, badge label, i18n (FR + EN)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/backoffice/lib/i18n/fr.ts

@@ -260,6 +260,8 @@ const fr = {
   "jobs.groupReadingStatus": "Statut de lecture",
   "jobs.matchReadingStatus": "Correspondance des séries",
   "jobs.matchReadingStatusShort": "Lier automatiquement les séries non associées au provider",
+  "jobs.pushReadingStatus": "Push des états de lecture",
+  "jobs.pushReadingStatusShort": "Envoyer les états de lecture modifiés vers AniList (push différentiel)",
 
   // Jobs list
   "jobsList.id": "ID",
@@ -366,6 +368,12 @@ const fr = {
   "jobDetail.readingStatusMatchReport": "Rapport de correspondance",
   "jobDetail.linked": "Liées",
   "jobDetail.ambiguous": "Ambiguës",
+  "jobDetail.readingStatusPush": "Push des états de lecture",
+  "jobDetail.readingStatusPushDesc": "Envoi différentiel des états de lecture vers AniList",
+  "jobDetail.readingStatusPushReport": "Rapport de push",
+  "jobDetail.pushed": "Envoyés",
+  "jobDetail.skipped": "Ignorés",
+  "jobDetail.noBooks": "Sans livres",
 
   // Job types
   "jobType.rebuild": "Indexation",
@@ -395,6 +403,9 @@ const fr = {
   "jobType.reading_status_match": "Correspondance statut lecture",
   "jobType.reading_status_matchLabel": "Correspondance des séries (statut lecture)",
   "jobType.reading_status_matchDesc": "Recherche automatiquement chaque série de la bibliothèque sur le provider de statut de lecture configuré (ex. AniList) et crée les liens pour les séries identifiées sans ambiguïté.",
+  "jobType.reading_status_push": "Push statut lecture",
+  "jobType.reading_status_pushLabel": "Push des états de lecture",
+  "jobType.reading_status_pushDesc": "Envoie les états de lecture modifiés (ou nouvelles séries) vers AniList de façon différentielle.",
 
   // Status badges
   "statusBadge.extracting_pages": "Extraction des pages",