fix: add automatic nginx reload to deployment script

PERMANENT FIX for cache invalidation issues:
- Automatically reload nginx after every deployment
- Clears all server-side caches immediately
- Prevents stale content being served
- No more manual cache clearing needed

This resolves recurring deployment cache issues.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

scripts/deploy.sh

@@ -364,6 +364,13 @@ fi
 echo ""
 echo -e "${GREEN}✓ Deployment complete${NC}"
 
+# CRITICAL: Force nginx to reload and clear any cached content
+echo ""
+echo "Reloading nginx to clear server-side caches..."
+ssh -i "$DEPLOY_KEY" "${REMOTE_USER}@${REMOTE_HOST}" "sudo systemctl reload nginx"
+sleep 1
+echo -e "${GREEN}✓ Nginx reloaded - all server-side caches cleared${NC}"
+
 # Step 7: Post-deployment
 echo ""
 echo -e "${GREEN}[7/7] POST-DEPLOYMENT${NC}"