chore(release): 0.1.6-unstable.20260822082522

[github-actions]

Version bump for 0.1.6-unstable.20260822082522, opened by the release workflow.

The tag v0.1.6-unstable.20260822082522 already names this commit, so the released
package and its label agree. Merging this brings development up
to the released version.

Raised as a pull request rather than pushed directly because
development requires one; a direct push is rejected with GH013
and takes the release down with it.

[rubenvdlinde]

Superseded. #425 carried 0.1.6-unstable.20260824072140 into development, which is at or ahead of this bump, so merging this one would move the version backwards.

These accumulate because the release workflow opens a version-bump PR (it cannot push straight at a protected branch — GH013) and nothing ever merges it, so every release adds another. Closing the backlog; the loop itself still needs closing in ConductionNL/.github release.yml.