fix: make keypair initialization robust to bad secret keys

fix: fault-tolerant startup — SorobanServer import v10 fix + try/except init

feat: add Vercel + Railway deployment config

chore: deploy contract addresses to README and fix tests workspace compilation & verification keys logic

fix(M2): register-identity now only accepts an on-device commitment hash, never raw sensor data

security: env-driven CORS, optional API-key auth on money endpoints, Bonsai raise_for_status

🔧 Fix: 10 build errors — imports, Cargo.toml typos, missing __init__.py, reqwest

🤖 ZeroSense: World-First ZK Robot Intelligence on Stellar — Initial Commit