fix(security) : harden auth, session, document access and health endpoint

- Remove orphaned PUBLIC_ACCESS rule for deleted /api/test route
- Remove JWT login firewall (app is session-based only)
- Set APP_SECRET placeholder (real value must be in .env.local)
- Remove JWT env vars from .env
- Add session regeneration on login (prevent session fixation)
- Remove Document.path from API serialization groups (prevent path leak)
- Restrict health check details to ROLE_ADMIN (anonymes get status only)
- Add path traversal guard in DocumentStorageService
- Convert CreateProfileCommand password to interactive hidden prompt
- Restrict Profile Get endpoint to ROLE_ADMIN
- Change api firewall to stateless: false (matches session-based auth)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.env

@@ -16,7 +16,7 @@
 
 ###> symfony/framework-bundle ###
 APP_ENV=dev
-APP_SECRET=
+APP_SECRET=change_me_in_env_local
 APP_SHARE_DIR=var/share
 ###< symfony/framework-bundle ###
 
@@ -40,8 +40,3 @@ DEFAULT_URI=http://localhost
 CORS_ALLOW_ORIGIN='^https?://(localhost|127\.0\.0\.1)(:[0-9]+)?$'
 ###< nelmio/cors-bundle ###
 
-###> lexik/jwt-authentication-bundle ###
-JWT_SECRET_KEY=%kernel.project_dir%/config/jwt/private.pem
-JWT_PUBLIC_KEY=%kernel.project_dir%/config/jwt/public.pem
-JWT_PASSPHRASE=
-###< lexik/jwt-authentication-bundle ###