Add user avatar system and fix WHOIS parsing/cron synchronization

- Add avatar upload with Gravatar fallback and initials
- Fix false "available" detection for registered domains
- Clean up WHOIS status parsing and server display
- Update cron job to sync all WHOIS fields
- Fix TLD cache and .me domain parsing issues

database/migrations/000_initial_schema_v1.1.0.sql

@@ -19,6 +19,7 @@ CREATE TABLE IF NOT EXISTS users (
     two_factor_backup_codes TEXT NULL,
     two_factor_setup_at TIMESTAMP NULL,
     full_name VARCHAR(255),
+    avatar VARCHAR(255) NULL,
     role VARCHAR(50) DEFAULT 'user',
     is_active BOOLEAN DEFAULT TRUE,
     last_login TIMESTAMP NULL,