fix: 使用 BytesIO 预加载字体

[fllesser]

fixes #433

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
42	1	41	3

View the full list of 1 ❄️ flaky test(s)

tests.parsers.test_twitter::test_video

Flake rate in main: 20.75% (Passed 191 times, Failed 50 times)

Stack Traces | 6.64s run time

.../nonebot_plugin_parser/download/__init__.py:57: in streamd
    response.raise_for_status()
.venv/lib/python3.14.../site-packages/httpx/_models.py:829: in raise_for_status
    raise HTTPStatusError(message, request=request, response=self)
E   httpx.HTTPStatusError: Client error '403 Forbidden' for url 'https://pbs.twimg.com/media/GmxZe5AWwAEuoiK.jpg'
E   For more information check: https://developer.mozilla..../HTTP/Status/403

During handling of the above exception, another exception occurred:
tests/parsers/test_twitter.py:32: in test_video
    await asyncio.gather(*[parse_video(url) for url in urls])
tests/parsers/test_twitter.py:29: in parse_video
    cover_path = await video_content.get_cover_path()
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.../nonebot_plugin_parser/parsers/data.py:51: in get_cover_path
    self.cover = await self.cover
                 ^^^^^^^^^^^^^^^^
.../nonebot_plugin_parser/download/__init__.py:175: in download_img
    return await self.streamd(url, file_name=img_name, ext_headers=ext_headers)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.../nonebot_plugin_parser/download/__init__.py:78: in streamd
    raise DownloadException("媒体下载失败")
E   nonebot_plugin_parser.exception.DownloadException: 媒体下载失败

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[github-actions]

类型	PIL 耗时(秒)	HTML 耗时(秒)	渲染所用图片总大小(MB)	PIL 导出图片大小(MB)	HTML 导出图片大小(MB)
微博视频2	0.01144	0.93117	0.01280	0.03694	0.17206
微博视频	0.01243	0.95870	0.01280	0.03591	0.17000
微博纯文2	0.04126	1.06221	0.00605	0.12128	0.28607
微博转发纯文	0.07158	1.17345	0.01382	0.24485	0.40196
微博转发(视频)	0.09353	1.23391	14.90968	0.37567	0.78044
微博转发(横图)	0.22885	1.36552	3.27378	0.48334	1.41127
哔哩哔哩动态	0.24100	2.48184	0.01244	0.19168	0.42498
微博图集(超过9张)	0.29335	1.25204	1.01576	0.31642	0.68563
微博图集(2张)	0.42286	1.17851	11.60759	0.64789	1.63232
微博图集(3张)	0.50605	1.19058	6.12349	0.34544	0.94297
bilibili-opus	0.51843	2.72478	1.21296	1.35127	2.35157
微博转发(竖图)	0.57489	2.31743	4.13997	0.41472	2.25983
微博图集(4张)	1.19427	2.01157	40.18564	0.71677	1.81547
微博图集(9张)	1.62231	2.12675	23.06663	0.98493	2.48285