refactor: vwts_scraper — proper Python package structure

- Split single file into 8 focused modules (399 lines total):
  config.py — constants
  fetch.py — HTTP GET with retries
  paginate.py — page_count + HEAD verification
  parse.py — HTML parsing (topics, posts, tags)
  state.py — per-section state.json
  output.py — JSONL with file rotation
  run.py — main orchestration loop
  __main__.py — CLI entry point
- Run: python -m vwts_scraper <URL>
- Page count method fully tested (13 sections, 100+ topics, 0 errors)
- Resume support (Ctrl+C → state saved)
- Per-section state files (no conflicts between sections)

vwts_scraper/output.py

@@ -0,0 +1,41 @@
+"""Сохранение темы в JSONL. Ротация каждые TOPICS_PER_FILE тем."""
+
+import json, logging
+from datetime import datetime
+from pathlib import Path
+from .config import TOPICS_PER_FILE
+
+OUTPUT_DIR = Path("vwts_data")
+log = logging.getLogger(__name__)
+
+
+def save_topic(section_slug: str, section_name: str, topic: dict,
+               posts: list, tags: list, state: dict):
+    """Записать тему в part_XXXX.jsonl. Ротирует файл каждые N тем."""
+    st = state
+
+    # ротация
+    if st["topic_count"] > 0 and st["topic_count"] % TOPICS_PER_FILE == 0:
+        st["file_index"] += 1
+
+    record = {
+        "section": section_name,
+        "topic_id": topic["id"],
+        "topic_title": topic["title"],
+        "topic_url": topic["url"],
+        "total_posts": len(posts),
+        "posts": posts,
+        "tags": tags,
+        "scraped_at": datetime.now().isoformat(),
+    }
+
+    d = OUTPUT_DIR / section_slug
+    d.mkdir(parents=True, exist_ok=True)
+    fpath = d / f"part_{st['file_index']:04d}.jsonl"
+
+    with open(fpath, "a", encoding="utf-8") as fh:
+        fh.write(json.dumps(record, ensure_ascii=False) + "\n")
+
+    st["topic_count"] += 1
+    log.info(f"      💾 part_{st['file_index']:04d}.jsonl "
+             f"({fpath.stat().st_size/1024/1024:.1f} MB)")