Migrate to MariaDB backend and fix bed management

- Switch from SQLite to MariaDB for database backend
- Fix bed state updates on admission (iniciarInternacion)
- Fix bed updates on admission edit (actualizarInternacion)
- Fix bed updates on discharge (finalizarInternacion): delete if fuera de area, mark available otherwise
- Fix NuevoIngreso to wait for cama creation before creating internacion
- Fix patient undefined check in Cultivos
- Update CORS to allow all origins
- Remove unused files

server/package.json

@@ -10,7 +10,6 @@
     "cors": "^2.8.5",
     "express": "^4.21.2",
     "http-proxy-middleware": "^3.0.5",
-    "sqlite": "^5.1.7",
-    "sqlite3": "^5.1.7"
+    "mariadb": "^3.4.0"
   }
 }