Add tabulate dependency for dashboard markdown rendering

[rioliu-rh]

Summary

Fix ImportError when running the Release Progress Dashboard on a VM.

Issue

When launching the dashboard as a systemd service, it fails with:

ImportError: Missing optional dependency 'tabulate'. Use pip or conda to install tabulate.

Root Cause

The dashboard uses pandas df.to_markdown() method in the metadata tabs (deployment/RELEASE_PROGRESS_DASHBOARD_DEPLOYMENT.md:289, 363), which requires the tabulate library as an optional pandas dependency.

Changes

• Added tabulate>=0.9.0 to tools/release_progress_dashboard/requirements.txt

Verification

After installing the updated requirements, the dashboard starts successfully without the ImportError.

Related

• Jira: OCPERT-205

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