RFC5424 compliance

[IngmarStein]

I was trying to send HA logs to Grafana Alloy which has standard-compliant parsers for RFC3164 and RFC5424. Unfortunately, as noted in #27, version 0.4.1 of this add-on doesn't conform to either standard.

This PR is similar to #27 but adds a dropdown option for the syslog format with the previous format as the default and a new RFC5424-compliant option.

The PR also bumps a few dependencies and drops the architectures which were recently removed from the HA builder.

[w531t4]

I wish i would have looked at existing pull requests first. Anyways, I tested this in my infra today and it works great. thanks @IngmarStein!

(i tested RFC5424)

[IngmarStein]

You're welcome @w531t4, glad you found it useful!
Now that HA stopped writing homeassistant.log, I assume more people are looking at syslog…
@mib1185 wdyt about merging this option? I'd love to drop my fork and use your original again.

[mib1185]

Hi @IngmarStein
many thanks for this contribution and I'm happy to review this PR. But first we should limit it to only handle one topic (the rfc5424 option).
The other changes should go in different PRs. and btw. I'm not planing to remove the un-supported platforms yet, as there might be users still using them and as long as there is not technical reason to remove the support, I will keep it.

[IngmarStein]

@mib1185 sure, understood. The reason why I removed the unsupported platforms is because new current builder image no longer has these architectures anymore so the project didn't build with 2025.11.0 (https://github.com/home-assistant/builder/releases/tag/2025.11.0). The decisions to drop these architectures were already made by HA core team in February and April.

[mib1185]

yeah, I know, therefore I drafted #29 for now to keep the current builder version running as long as possible.

[IngmarStein]

Sure! Feel free to cherry-pick only the parts you like.