feat: fix registration 500, add forgot-password flow, frontend validation

- Fix MissingGreenlet: sync_engine now uses psycopg2 instead of asyncpg
- Fix bcrypt/passlib compat: pin bcrypt<4.1 in requirements
- Fix legacy password_hash NOT NULL: alter column to nullable in migration
- Add frontend password validation (uppercase + lowercase + digit)
- Add forgot-password and reset-password backend endpoints
- Add forgot-password and reset-password frontend pages
- Add email_service.py (SMTP via admin settings)
- Add reset_token/reset_token_expires columns to User model
- Migrate legacy JSON-only users to DB on password reset request
- Mount data/ volume in docker-compose.local.yml for persistence
- Add production deployment config (Dockerfile, nginx, deploy.sh)

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

data/provider_settings.json

@@ -7,6 +7,14 @@
     "timeout": 30,
     "max_retries": 3
   },
+  "google_cloud": {
+    "enabled": false,
+    "api_key": "esenaw",
+    "base_url": null,
+    "model": null,
+    "timeout": 30,
+    "max_retries": 3
+  },
   "deepl": {
     "enabled": false,
     "api_key": null,
@@ -55,6 +63,15 @@
     "timeout": 30,
     "max_retries": 3
   },
+  "smtp": {
+    "enabled": true,
+    "host": "smtp.ionos.fr",
+    "port": 587,
+    "username": "admin@wordly.art",
+    "password": "Esenaw,121151",
+    "from_email": "admin@wordly.art",
+    "use_tls": true
+  },
   "fallback_chain": "google,deepl,openai,ollama,openrouter,zai",
   "fallback_chain_classic": "google,deepl",
   "fallback_chain_llm": "ollama,openai,openrouter,zai"