feat(schemas): T17 add Pydantic auth schemas

Add authentication schemas for user registration and login:
- UserRegister: email, password (with strength validation), password_confirm
- UserLogin: email, password
- UserResponse: id, email, created_at, is_active (orm_mode=True)
- TokenResponse: access_token, token_type, expires_in
- TokenData: user_id, exp

Includes field validators for password strength and password confirmation matching.

Test coverage: 19 tests for all schemas

docs/githistory.md

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+
+## 2026-04-07: Security Services Implementation (T12-T16)
+
+### Commits
+
+- `2fdd9d1` feat(security): T12 implement AES-256 encryption service
+- `54e8116` feat(security): T13 implement bcrypt password hashing
+- `781e564` feat(security): T14 implement JWT utilities
+- `649ff76` feat(security): T15 implement API token generation
+- `a698d09` feat(security): T16 finalize security services exports
+
+### Contenuto
+
+Implementazione completa dei servizi di sicurezza con TDD:
+- EncryptionService (AES-256-GCM con PBKDF2HMAC)
+- Password hashing (bcrypt 12 rounds) con strength validation
+- JWT utilities (HS256) con create/decode/verify
+- API token generation (SHA-256) con timing-safe comparison
+
+### Statistiche
+
+- 70 test passanti
+- 100% coverage su tutti i moduli security
+- 5 commit atomici seguendo conventional commits
+
+### Note
+
+Tutti i test sono stati scritti prima del codice (TDD puro).
+Ogni servizio ha test per casi di successo, errori, e edge cases.