Publishes the Render-compatible public LiDMaS+ API for Gottesman Studio.

[DennisWayo]

This branch aligns the public API with the Studio simulator workflow: circuit construction, architecture-aware QEC selection, noise injection, syndrome extraction, and decoder-policy comparison.

Changes:

• Exposes public simulator fixtures for PennyLane, Qiskit Aer, Cirq, and SchroSIM.
• Keeps public mode bounded to simulator/replay/benchmark-safe execution.
• Removes dependence on private provider secrets, IBM credentials, lab hardware control, or backend-heavy workflows.
• Updates run, telemetry, validation, logs, provider, and observability responses so the Studio UI can stay exact and zero-state until a session starts.
• Keeps the API deployable on Render free-tier without database or persistent filesystem assumptions.

Verification:

• Render service is live at https://lidmas-api.onrender.com
• GET /api/v1/health returns OK with version 1.2.2-public-demo
• Gottesman Studio can call the public API from GitHub Pages through configured CORS.