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/App.tsx

@@ -52,7 +52,7 @@ function AppContent() {
             pacientes={store.pacientes}
             internaciones={store.internaciones}
             onActualizarCama={store.actualizarCama}
-            onAgregarCama={store.agregarCama}
+            onAgregarCama={store.agregarCama as any}
             onEliminarCama={store.eliminarCama}
             onIniciarInternacion={store.iniciarInternacion}
             getPacienteById={store.getPacienteById}