Fixed simulate mode swapping package version and architecture

[djbclark]

RecordPkgOperationInChroot() wrote a package's architecture before its version, the reverse of the order both readers expect, so --simulate reported foo-1.2.3 [x86_64] instead of foo-x86_64 [1.2.3]. The fix swaps the two writes and names the record format in a comment at the writer. One regression test, which fails without the fix:

$ tests/unit/simulate_mode_test      # without the fix
test_diff_version_and_architecture: Test failed.
1 out of 3 tests failed!
$ tests/unit/simulate_mode_test      # with the fix
All 3 tests passed

Ubuntu 24.04: make -C tests/unit check → All 75 tests passed; tests/acceptance/29_simulate_mode/ as root → 4 of 4 Pass. Fork CI: djbclark#39

AI-assisted. I can't vouch for the C syntax beyond a basic level, but I did look at the logic and it seemed sound.

🤖 Generated with Claude Code

[cf-bottom]

Thank you for submitting a PR! Maybe @larsewi can review this?

[larsewi]

@cf-bottom Jenkins please :)

[cf-bottom]

Sure, I triggered a build:

Jenkins: https://ci.cfengine.com/job/pr-pipeline/14786/

Packages: http://buildcache.cfengine.com/packages/testing-pr/jenkins-pr-pipeline-14786/

[larsewi]

Thank you for the contribution @djbclark 🚀