Update README onboarding and positioning

[osama1998H]

Summary

• refresh the README above the fold with a clearer value proposition and project scope
• replace broken auth examples with a working quickstart and password that matches current validation rules
• clarify that protected routes are currently JWT-first and add scoped API-key auth as roadmap work
• improve trust and discoverability with CI/license badges and direct links to docs and deployment resources

Testing

• Not run (not requested)

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: d0b7dccd-23a2-4d35-87ce-193af96a67ca

📥 Commits

Reviewing files that changed from the base of the PR and between 41f6fc9 and d61a96c.

📒 Files selected for processing (1)

• README.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch increse-exposer

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