refactor(render): simplify error counting logic using closures

[fllesser]

No description provided.

[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	0.01135	0.75246	0.01280	0.03541	0.14920
微博视频	0.01564	0.76827	0.01280	0.03432	0.14748
微博纯文2	0.03191	0.83566	0.00605	0.12023	0.20299
微博转发纯文	0.07992	1.02934	0.01382	0.24414	0.44455
微博转发(横图)	0.19052	1.47551	1.26621	0.48412	2.13023
B站转发动态	0.21314	1.54851	0.37278	0.38265	1.40774
哔哩哔哩动态(包含emoji)	0.24261	1.84414	0.01244	0.18507	0.36532
微博转发(竖图)	0.29218	2.56433	1.33334	0.41583	3.54991
微博图集(超过9张)	0.29675	1.20528	1.01614	0.31669	0.90518
微博图集(3张)	0.32476	1.00518	2.73813	0.34359	1.14213
微博图集(2张)	0.33486	1.12500	4.88308	0.64458	2.19027
微博图集(4张)	0.40680	1.68207	2.34023	0.72816	2.40468
B站动态	0.52583	3.00480	0.00653	1.34777	2.67611
微博图集(9张)	1.20564	2.03832	10.98936	0.98579	3.06691

[codecov]

Codecov Report

❌ Patch coverage is 15.00000% with 17 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/nonebot_plugin_parser/renders/base.py	0.00%	17 Missing ⚠️

Files with missing lines	Coverage Δ
src/nonebot_plugin_parser/download/task.py	89.09% <100.00%> (ø)
src/nonebot_plugin_parser/renders/base.py	30.61% <0.00%> (-3.10%)	⬇️

... and 2 files with indirect coverage changes