Allow empty text for non-target AI rewrites

src/vk_parser_app/workers/ai_writer.py

@@ -152,8 +152,6 @@ def validate_rewrites(
         if post_id not in expected_ids:
             raise ValueError(f"AI returned unexpected id={post_id}")
         text = strip_leading_emoji_markers(str(item.get("text") or "").strip())
-        if len(text) < 40:
-            raise ValueError(f"AI returned too short rewrite for id={post_id}")
         by_id = {int(c["id"]): c for c in categories if c.get("id") is not None}
         by_name = {str(c["name"]).lower(): c for c in categories if c.get("name")}
         if item.get("category_id") is not None:
@@ -170,6 +168,8 @@ def validate_rewrites(
         seen.add(post_id)
         category_tag = normalize_hash_tag(category_row.get("tag") or category_row.get("name") or "", "category")
         reject_by_category = int(category_row["id"]) == NON_TARGET_CATEGORY_ID or category_tag.lower() in NON_TARGET_CATEGORY_TAGS
+        if not reject_by_category and len(text) < 40:
+            raise ValueError(f"AI returned too short rewrite for id={post_id}")
         out.append(
             {
                 "id": post_id,