feat: RapidOCR default OCR engine, office-only ocr_engine, drop operator toggle

tests/test_config_loader.py

@@ -49,7 +49,7 @@ def test_do_block_and_batch_default_mode(repo_config_path):
     assert cfg.do.photo_dir == "do_photos"
     assert cfg.do.max_photos_per_batch == 8
     assert cfg.do.zone_warn_seconds == 3
-    assert cfg.do.ocr.engine == "tesseract"
+    assert cfg.do.ocr.engine == "rapid"
 
 
 def test_do_block_missing_uses_defaults(tmp_path):
@@ -65,7 +65,7 @@ def test_do_block_missing_uses_defaults(tmp_path):
     cfg = load_config(p)
     assert cfg.batch.default_mode == "auto"
     assert cfg.do.enabled is True
-    assert cfg.do.ocr.engine == "tesseract"
+    assert cfg.do.ocr.engine == "rapid"
     assert cfg.do.retention_days == 7