Add batch processing for pending OCR

README.md

@@ -528,6 +528,37 @@ Do not recreate the database this way after it contains manually maintained meta
 
 OCR data must also be recreated if the database is deleted.
 
+## OCR batch processing
+
+Process all movies waiting for OCR:
+
+```bash
+scripts/process_pending_ocr.py
+```
+Limit the number of records:
+```bash
+scripts/process_pending_ocr.py --limit 5
+```
+Use a test database:
+```bash
+scripts/process_pending_ocr.py \
+  --database database/wcx-test.db \
+  --limit 1
+```
+The script selects movies with ocr_status = 'pending' and invokes
+check_ocr.py once per movie. Processing continues if an individual movie
+fails.
+
+Possible results are:
+
+completed
+manual_review
+failed
+
+A summary is printed after the batch has finished.
+
+GOOGLE_VISION_API_KEY must be available in the environment.
+
 ## Legacy CSV migration
 
 The historical index is stored in: