fix: Add scipy dependency and fix config for Docker deployment

- Add scipy==1.11.4 for A/B testing statistical analysis
- Add SMTP config fields and extra="ignore" to Settings
- Remove obsolete 'version' attribute from docker-compose.yml

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

requirements.txt

@@ -34,6 +34,9 @@ pydantic-settings==2.1.0
 python-jose[cryptography]==3.3.0
 passlib[bcrypt]==1.7.4
 
+# Estadísticas (A/B Testing)
+scipy==1.11.4
+
 # Templates HTML
 jinja2==3.1.3