Jellyfin: Add more test scaffolding. (#1403)

diff --cc requirements_all.txt
index 223d2342fee4f9979ba6b1137898bdc6912ec94a,12c0948ff16027a1aae364f2bc2a3e4d46b4d281..637ab1f7a1a4fbb59ca86c12c48ad844d52f3a70
--- 1/requirements_all.txt
--- 2/requirements_all.txt
+++ b/requirements_all.txt
@@@ -2,9 -2,9 +2,9 @@@
  
  Brotli>=1.0.9
  aiodns>=3.0.0
 -aiofiles==23.2.1
 +aiofiles==24.1.0
  aiohttp==3.9.5
- aiojellyfin==0.7.0
+ aiojellyfin==0.8.3
  aiorun==2024.5.1
  aioslimproto==3.0.1
  aiosqlite==0.20.0