v0.1.0

First public release.

Added

• url-to-pdf, html-to-pdf (file or stdin), status, download, version.
• Output handling: -o DIR (created if missing), -f NAME, -o - to stream
  the PDF to stdout; atomic writes (temp file + rename), never to a terminal.
• Page options: --format (A0–A6, Letter, Legal, Tabloid, Ledger),
  --landscape, --margin (CSS shorthand) and --margin-<side>,
  --no-background; --test for free end-to-end runs that return a sample
  PDF; -q/--quiet; --timeout.
• Documented exit codes: 0 ok, 1 failed, 2 usage, 3 rendering failed on the
  server, 4 not finished within --timeout, 130 interrupted. Ctrl-C cancels
  cleanly: no partial file is left behind and the in-flight job id is printed.
• wkhtmltopdf compatibility mode: every wkhtmltopdf flag is mapped, accepted
  with a warning, or refused with a reason — see COMPATIBILITY.md. Includes
  --default-header, --replace, --title, case-insensitive [toPage]-style
  placeholders, pt margins, file:// input, and --version/-h probes for
  wrappers such as pdfkit and wicked_pdf.
• Client robustness: one Idempotency-Key per submission with retries on
  transport errors and 502/503/504 (a job is never charged twice), rate-limit
  aware polling (Retry-After honoured and capped), download stall detection
  that never trips on a slow consumer, retry of the free download-busy
  rejection, API-key stripping on cross-host and https→http redirects, refusal
  of plain-http API URLs, terminal-escape sanitization of server text.
• Static binaries for Linux/macOS/Windows with a checksums file, and a
  FROM scratch non-root container image.