Development: Update Theia portal URL to staging for all test environments

[CodeByNikolas]

Motivation and Context

All test environments (TS1, TS2, TS3, TS9) are currently pointing to different Theia test cluster URLs. Since the Theia team maintains a stable staging environment, test environments should use this for consistency and stability.

Since the test1, test2, and test3 clusters are primarily intended for individual or experimental testing and do not guarantee stability, using the shared staging environment ensures a more reliable and consistent setup across all test systems.

Related: This aligns all test environments with the existing staging1 and staging2 configurations which already use theia-staging.artemis.cit.tum.de.

Description

Updated the Theia portal URL configuration for all test environments to point to the stable staging Theia instance:

Changed files:

• group_vars/artemistests_theia.yml (affects TS9): test1.theia-test → theia-staging
• group_vars/artemistest1.yml: test1.theia-test → theia-staging
• group_vars/artemistest2.yml: test2.theia-test → theia-staging
• group_vars/artemistest3.yml: test3.theia-test → theia-staging

All test environments now use https://theia-staging.artemis.cit.tum.de instead of their individual test cluster URLs.

[coderabbitai]

📝 Walkthrough

Walkthrough

Four Ansible environment configuration files are updated to redirect their Theia portal URL endpoint from individual test environment domains to a unified staging domain. Each file's theia.portal_url is modified accordingly, with no other structural or behavioral changes.

Changes

Cohort / File(s)	Summary
Theia Portal Configuration Updates group_vars/artemistest1.yml, group_vars/artemistest2.yml, group_vars/artemistest3.yml, group_vars/artemistests_theia.yml	Updated theia.portal_url from individual test environment URLs (test1, test2, test3.theia-test.artemis.cit.tum.de) to shared staging URL (https://theia-staging.artemis.cit.tum.de).

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

🐰 ✨ Four burrows, one staging place—
Where test domains give way to grace,
Theia's portals realign,
From scattered test to staging's line!
A config hop, a hop so fine! 🌱

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: updating Theia portal URLs to staging across test environments, matching the changeset's focus on four configuration files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/update-theia-portal-url-to-staging

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