docs: def fill_missing_info(info: dict, site_url: str = DEFAULT_SITE) -> dict:
      "Add missing info in a censored post info dict."
      try:
          md5, ext = find_censored_md5ext(info["id"])
      except TypeError:  # None returned by find_..
          return info
  
      sample_ext = "jpg" if ext != "zip" else "webm"
  
      if info["id"] > 2_800_000:
          site_url   = site_url.rstrip("/")
          file_url   = f"{site_url}/data/{md5}.{ext}"
          sample_url = f"{site_url}/data/sample/sample-{md5}.{sample_ext}"
      else:
          server     = "raikou2" if info["id"] > 850_000 else "raikou1"
          url_base   = f"https://{server}.donmai.us"
          file_url   = f"{url_base}/{md5[:2]}/{md5[2:4]}/{md5}.{ext}"
          sample_url = (f"{url_base}/sample/{md5[:2]}/{md5[2:4]}/"
                        f"sample-{md5}.{sample_ext}")
  
      if info["image_width"] < 850:
          sample_url = file_url
  
      return {**info, **{
          "file_ext":         ext,
          "md5":              md5,
          "file_url":         file_url,
          "large_file_url":   sample_url,
          "preview_file_url": (f"https://raikou4.donmai.us/preview/"
                               f"{md5[:2]}/{md5[2:4]}/{md5}.jpg"),
      }}