fix(rewrite): make image upload non-fatal and add rewrite tracing logs

- wordpress.py: catch image download/upload failures and skip image
  instead of aborting the entire WP draft update
- pipeline.py: add INFO logs at each step of _do_rewrite_and_draft
  to trace OpenAI call, tag generation, and WP API call
- telegram_bot.py: add INFO logs around rewrite execution + exc_info
  on error for full traceback in logs
- repositories.py: include scheduled_publish_at in get_article_by_id

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

docs/wiki/Operations-Runbook.md

@@ -18,6 +18,26 @@
 3. Payload-Validation/Tag-Fehler?
 4. Artikel in `pending` statt `failed` markieren, wenn unklar
 
+## Incident: Telegram-Buttons reagieren nicht / Befehle ignoriert
+
+**Ursache:** N8N "App Release - Telegram Bot"-Workflow hat den Webhook überschrieben.
+
+**Prüfen:**
+```bash
+curl -s "https://api.telegram.org/bot8403822424:AAGp8gZoNIGZv3IIan45q7P9HfM868qzXi4/getWebhookInfo" | python3 -m json.tool
+```
+→ `url` muss auf `https://news.vanityontour.de/telegram/webhook` zeigen
+→ `allowed_updates` muss `["message", "callback_query"]` enthalten
+
+**Webhook zurücksetzen:**
+```bash
+curl -s -X POST "https://api.telegram.org/bot8403822424:AAGp8gZoNIGZv3IIan45q7P9HfM868qzXi4/setWebhook" \
+  -H "Content-Type: application/json" \
+  -d '{"url":"https://news.vanityontour.de/telegram/webhook","allowed_updates":["message","callback_query"],"secret_token":"RWWAaBwfCUX9Y573JVkB9zAeloHsZZoruXOBBgUtsvU"}'
+```
+
+Vollständige Dokumentation: `projects/webhook/telegram-webhook-reset.md`
+
 ## Backups
 - SQLite-Dump taeglich
 - Konfiguration und `.env` sicher sichern