update to 2.19.4

[wwwutz]

• paperless 2.18.4 => 2.19.4
• node 22.19.0 => 24.11.0
• sqlite 3.50.4 => 3.51.0
• libtiff 4.7.0 => 4.7.1
• nginx 1.27.3 => 1.29.3
• python 3.12.11 => 3.12.12
• redis 7.4.1 => 8.2.3
• imagemagick 7.1.2-3 => 7.1.2-8
• ghostscript 10.05.1 => 10.06.0
• jbig2enc 0.30-14 => 0.30-16
• leptonica 1.85.0 => 1.87.0

• fixed migration vs. redis
• migration moved to startstop
• add runifchanged dev helper