tooling: instagram-chrome-scrape.py (was reels-scrape.py) gains --tab posts with early stop; chrome-sync.sh + reels/posts-sync.sh wrappers; MANUAL-RUN.md; atomic-deploy note

scripts/gdl-sync.py

@@ -225,7 +225,7 @@ def read_urls_file(path: Path) -> list[str]:
 def read_post_urls_file(path: Path) -> list[str]:
     """
     Read individual post/reel URLs from a file, one per line -- the output
-    format `reels-scrape.py` writes. Blank lines and `#` comments are skipped;
+    format `instagram-chrome-scrape.py` writes. Blank lines and `#` comments are skipped;
     order is kept and duplicates dropped, same conventions as read_urls_file.
     """
     urls: list[str] = []
@@ -929,7 +929,7 @@ def main() -> int:
                    help="file of post/reel URLs, one per line; # comments and "
                         "blank lines allowed. Same handling as --post-url, "
                         "paced with --sleep-request between items. This is "
-                        "the format reels-scrape.py writes")
+                        "the format instagram-chrome-scrape.py writes")
     ap.add_argument("--cookies", default="chrome:/home/matt/.config/google-chrome-devtools",
                     help="gallery-dl --cookies-from-browser value")
     ap.add_argument("--archive-db", type=Path, default=None,