I was looking over your log again, after setting up local intros on my test setup, and I don't see any local intro/pre-roll logs nor do I see the plugin installed.
Jellyfin 10.10.3 (Docker)
Ubuntu 24.04 LTS
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
3x WD Red Pro 6TB CMR in RAIDZ1 (JF Library)