Edit domain: not all changes trigger updates to "Last modified" timestamp

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Description

Modifying a domain on the Edit object > Edit domain tab does not update the Last modified timestamp in the following case: I added a tag and clicked Save changes, but the timestamp was not updated. The same applies to deleting a tag -- this will not update the timestamp either.

Steps to reproduce:

Edit a domain
Add a tag
Click Save changes.
Observe that the timestamp for Last modified was not updated.

Logs:

N/A

Which branch are you using?

master (stable)

Which architecture are you using?

x86_64

Operating System:

Debian GNU/Linux 13 (trixie)

Server/VM specifications:

N/A

Is Apparmor, SELinux or similar active?

N/A

Virtualization technology:

N/A

Docker version:

29.1.1

docker-compose version or docker compose version:

v2.40.3

mailcow version:

2025-10a

Reverse proxy:

Apache 2.4.65-2

Logs of git diff:

N/A

Logs of iptables -L -vn:

N/A

Logs of ip6tables -L -vn:

N/A

Logs of iptables -L -vn -t nat:

N/A