Move reference_results.metadata into reference-results/ directory

[Geethapranay1]

Fixes #537

Moves reference_results.metadata from the tutorial root directory into the reference-results/ directory, colocating it with the .tar.gz reference result files it describes.

Before

tutorial/
├── reference-results/
│   └── results.tar.gz
└── reference_results.metadata

After

tutorial/
└── reference-results/
    ├── results.tar.gz
    └── reference_results.metadata

Changes

• moved metadata files into reference-results/ for all tutorials:
  • elastic-tube-1d
  • flow-over-heated-plate
  • multiple-perpendicular-flaps
  • perpendicular-flap
• updated tools/tests/generate_reference_results.py to write metadata inside the reference-results/ directory
• updated .github/workflows/generate_reference_results_workflow.yml to use the new git add pattern.

Checklist

• I added a summary of any user-facing changes (compared to the last release) in the changelog-entries/537.md.
• I will remember to squash-and-merge, providing a useful summary of the changes of this PR.

[Copilot]

Pull request overview

This PR reorganizes the reference results metadata files by moving them from tutorial root directories into their respective reference-results/ subdirectories, colocating them with the .tar.gz reference result archives they describe. This addresses issue #537 which noted that having the metadata files outside the reference results directory "just looks odd."

Changes:

• Modified generate_reference_results.py to write metadata files inside reference-results/ directories
• Updated GitHub workflow to use the new git add pattern for metadata files
• Moved metadata files for 4 tutorials into their reference-results/ directories

Reviewed changes

Copilot reviewed 3 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tools/tests/generate_reference_results.py	Updated to create and write metadata files in reference-results/ subdirectory instead of tutorial root
.github/workflows/generate_reference_results_workflow.yml	Updated git add pattern to match new metadata file location
perpendicular-flap/reference-results/reference_results.metadata	Added metadata file in new location
multiple-perpendicular-flaps/reference-results/reference_results.metadata	Added metadata file in new location
flow-over-heated-plate/reference-results/reference_results.metadata	Added metadata file in new location
elastic-tube-1d/reference-results/reference_results.metadata	Added metadata file in new location
changelog-entries/537.md	Documented the change in changelog

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[Copilot]

This line contains trailing whitespace. Please remove the trailing spaces after exist_ok=True).

Suggested change

	reference_results_dir.mkdir(parents=True, exist_ok=True)
	reference_results_dir.mkdir(parents=True, exist_ok=True)

[MakisH]

@Geethapranay1 how have you tested this? Any logs would help.

[Geethapranay1]

1.files moved to new location:

2. generation script updated:

3. workflow pattern updated:

the changes only affect file paths the metadata content, format, and generation logic remain unchanged. The script correctly writes to the new location and the workflow pattern picks up files from there.

running the full docker-based generation test to confirm end-to-end. Will update with logs once complete.