Sven Tennie

## Checklist - [ ] Add a new entry in an appropriate subdirectory of `changelog.d` - [ ] Read and follow the [PR guidelines](https://docs.wire.com/developer/developer/pr-guidelines.html)

Try compacting gc

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## Checklist - [ ] Add a new entry in an appropriate subdirectory of `changelog.d` - [ ] Read and follow the [PR guidelines](https://docs.wire.com/developer/developer/pr-guidelines.html)

M4 - first run

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Pipeline to build the M4 release. **Should never be merged.**

Check CI

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This PR only exists to see the CI running. :gear:

Reintroduce Terraform

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OpenTofu is not a full drop-in replacement: It fails when it queries additional Terraform providers from the registry for cailleach commands (e.g. `make re-init`.) OpenTofu now runs its own registry...

Though, having multiple mapping types per index is deprecated (https://www.elastic.co/guide/en/elasticsearch/reference/7.17/removal-of-types.html), updating the mapping of an index seems to be still a valid operation (https://www.elastic.co/guide/en/elasticsearch/reference/8.15/indices-put-mapping.html). So, I'm wondering if I got...

**This should only be released in combination with an infrastructure migration from ElasticSearch 6 to OpenSearch 1.3.** Ticket: https://wearezeta.atlassian.net/browse/WPB-10715 ## Checklist - [x] Add a new entry in an appropriate...

Ignore more files (.gitignore)

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Add files to `.gitignore` that are generated by the build system.

Fix "renew certs" for newer Kubespray clusters

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The command line interface of `kubeadm`' changed a bit: - Used commands aren't *alpha* anymore - `--apiserver-advertise-address` is gone for `kubeconfig user` (it works as expected without) - `--config` is...