v1.0.2

Fixes from a review of v1.0.1, each reproduced against v1.0.1 before it
was fixed, plus one more that the live check turned up.

The first run in the README failed in v1.0.1. --mode listing --url "https://www.avito.ru/moskva?q=iphone+15" --pages 2 could exit 4
("0 rows — refusing to write") after 0 ms. Upgrade if you met that.

Fixed

• A page skeleton was taken for an empty listing. Any served avito
  page without cards and without a pager counted as empty, and the
  readiness wait stopped on it at once — so a listing whose cards had not
  painted yet exited 4 with no data. empty is now given only on an
  explicit sign (the «Похожие объявления» substitutes heading); a page that
  is merely without cards is waited for, and is called empty only if it is
  still without cards after the full wait. Measured after the fix: the
  command above gives 100 rows over the Scraping Browser (readiness waits
  of 500 and 1000 ms — the skeleton was there) and 100 rows on a local
  browser.
• The same after a proof-of-work. Once the firewall's proof-of-work
  cleared, a skeleton that followed was classified empty straight away
  ("page 1 is a served listing with no cards on it", exit 4). Same fix;
  measured on the local route: proof-of-work → GeeTest → 100 rows.
• --out into a directory that does not exist crashed with
  FileNotFoundError and wrote not even the attempt metadata — and the
  README's examples write to live/, which a fresh clone does not have.
  The directory is created now, for the output, the metadata and
  --dump-html.
• solver_cost was always 0. 2Captcha returns a solve's cost as a
  string; the total counted numbers only. Found on the live check (two
  solves at $0.00299, reported total 0).
• The item-mode log counted against the whole input (item 1/100 under
  --max-products 2); it now counts what will be fetched.