Improve Polarion vs EA display when model is already in sync

[Copilot]

The ReviewPolarionRequirements.yml workflow posted an unhelpful PR comment with an empty Changed Requirements: section when Polarion was already in sync with the EA model.

Changes

• ReviewPolarionRequirements.yml — "Post Finish message in PR" step now branches on whether modified requirements exist:
  • No changes: Renders a structured status card (branch, commit, run link) consistent with the UpdatePolarionByComments workflow style
  • Changes present: Preserves existing format with LemonTree session links and requirements list

New "in sync" comment format:

## Polarion vs Model Comparison - Run #<run_id>

**Status:** ✅ Polarion is in sync with EA model

**Details:**
- Branch: `<branch>`
- Changed Requirements: None
- Commit: `<commit-id>`
- Run: [View logs](<url>)

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*This comment is automatically updated per run*

[github-actions]

Model Check Results

LemonTree ModelCheck results

	Severity	Issue	Message
🔴	Error	Model has 1 suspected traceability links	Some requirements have suspected traceability links. Please review and confirm the traceability links.
🔴	Error	Model has 1 deleted ALM elements	Some ALM elements have been deleted. Please review and confirm the deletions.
🟠	Warning	Model has 57 unsatisfied requirements	Each requirement should be linked to at least one design element using a 'satisfy' relationship.
🟠	Warning	Model has 2 ports without interface definition	All ports should have an interface definition assigned.
🟠	Warning	Model has 30 untraced Polarion requirements	Each Polarion requirement must have at least one Trace relationship (type Trace or stereotype 'trace') to a non-requirement (architecture) element.
🟢	Passed	All requirements only have incoming links to architecture elements
🟢	Passed	There are no orphaned InterfaceBlocks
🟢	Passed	No Journal entries in the model

[github-actions]

✔️ Model is identical!

Modified Elements in SystemArchitecture:

Found 0 Diagrams.

[github-actions]

Polarion vs Model Comparison - Run #24076227963

Status: ✔️ Polarion is in sync with EA model

Details:

• Branch: copilot/improve-polarion-display
• Changed Requirements: None
• Commit: aed7e8bb83f9ba165f7455b13d9e9586b3954956
• Run: View logs

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This comment is automatically updated per run