refactor(protected-phrases): extract config and text normalization helpers

python/ebook_search/protected_phrases/config/__init__.py

@@ -0,0 +1,15 @@
+"""Protected phrase extraction, storage, and runtime matching."""
+
+from python.ebook_search.protected_phrases.config.lib import (
+    get_bad_ends,
+    get_bad_starts,
+    get_ignored_phrases,
+    get_most_common_words,
+)
+
+__all__ = [
+    "get_bad_ends",
+    "get_bad_starts",
+    "get_ignored_phrases",
+    "get_most_common_words",
+]