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

src/sections/MapaCamas.tsx

@@ -17,10 +17,10 @@ interface MapaCamasProps {
   pacientes: Paciente[];
   internaciones: Internacion[];
   onActualizarCama: (id: string, datos: Partial<Cama>) => void;
-  onAgregarCama: (cama: Omit<Cama, 'id'>) => string;
+  onAgregarCama: (cama: Omit<Cama, 'id'>) => any;
   onEliminarCama: (id: string) => void;
-  onIniciarInternacion: (internacion: Omit<Internacion, 'id' | 'activa'>) => void;
-  onAgregarArea: (area: Omit<Area, 'id'>) => string;
+  onIniciarInternacion: (internacion: Omit<Internacion, 'id' | 'activa'>) => Promise<string>;
+  onAgregarArea: (area: Omit<Area, 'id'>) => any;
   onActualizarArea: (id: string, datos: Partial<Area>) => void;
   onEliminarArea: (id: string) => void;
   getPacienteById: (id: string) => Paciente | undefined;