[paheal] Paheal's metadata is broken and incomplete

[Athari]

When I run:

gallery-dl --dump-json "https://rule34.paheal.net/post/list/The_Lion_King_II%3A_Simba%27s_Pride/1"

I get entries like this:

    {
      "category": "paheal",
      "file_url": "https://tulip.paheal.net/_images/42d3c148468101f78ae6c4be3b33f<...>.jpg",
      "height": 1536,
      "id": 4423277,
      "md5": "42d3c148468101f78ae6c4be3b33f1a9",
      "search_tags": "The_Lion_King_II:_Simba's_Pride",
      "size": 0,
      "subcategory": "tag",
      "tags": "Simba The_Lion_Guard The_Lion_King The_Lion_King_II:_Simba&#039;s_Pride Vitani kaion",
      "width": 2200
    }

Issues:

1. [bug] The tags field contains HTML-escaped text: The_Lion_King_II:_Simba's_Pride. This seems to be the case when searching for a tag, but not when downloading a post directly. Haven't tested it thoroughly.
2. [bug] The size field is sometimes equal to 0. This, conversely, seems to be the case in the post subcategory, but not in the tags.
3. [feature-request] The source_link field is not present in metadata, which is a really important piece of information.
4. [feature-request] The upload_date field (and possibly uploader_name) are missing. 'Last-Modified' HTTP header seems to match the value, but I'd rather have data directly in metadata if it's provided by the website.

Gallery-dl version 1.21.2 (I noticed the new 1.22 release, but Paheal isn't mentioned in the list of changes)

[mikf]

Done in 61fa9b5 and 4b78bd4, and part of v1.22.1.

You need to enable the metadata option to get full metadata for tag search URLs. Single posts work without.

gallery-dl -o metadata=1 --dump-json "https://rule34.paheal.net/post/list/The_Lion_King_II%3A_Simba%27s_Pride/1"

    {
      "category": "paheal",
      "date": "2021-06-28 03:23:01",
      "extension": "jpg",
      "file_url": "https://tulip.paheal.net/_images/42d3c148468101f78ae6c4be3b33f1a9/4423277%20-%20Simba%20The_Lion_Guard%20The_Lion_King%20The_Lion_King_II%3A_Simba%27s_Pride%20Vitani%20kaion.jpg",
      "filename": "4423277 - Simba The_Lion_Guard The_Lion_King The_Lion_King_II:_Simba's_Pride Vitani kaion",
      "height": 1536,
      "id": 4423277,
      "md5": "42d3c148468101f78ae6c4be3b33f1a9",
      "search_tags": "The_Lion_King_II:_Simba's_Pride",
      "size": 282931,
      "source": "https://inkbunny.net/s/2477229",
      "subcategory": "tag",
      "tags": "Simba The_Lion_Guard The_Lion_King The_Lion_King_II:_Simba's_Pride Vitani kaion",
      "uploader": "TheFapper19",
      "width": 2200
    }