Ci/env example parity 815

[warisu]

📝 Pull Request Summary

Description

This PR satisfies Issue #815 (FE-026) by introducing an automated environment configuration sync guard. It validates that any required key added to the frontend core runtime (AppEnvironment inside lazyEnvValidator.ts) has a corresponding default template entry within the public .env.example file.

Key Modifications

• Automated Parsing Script: Created scripts/validate_env_parity.ts to run structural key analysis on interfaces and flag missing fields.
• CI Validation Stage Integration: Deployed a GitHub Action workflow file (env-parity-validation.yml) that acts as a check for incoming pull requests.
• Proactive Developer Ergonomics: Prevents developer environmental runtime failures during repository sync steps.

Closes #815

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[RUKAYAT-CODER]

Great job so far

There’s just one blocker — the workflow is failing. Could you take a look and fix it so all checks pass?
You could pull from the main to get the changes before pushing.