A 32-year-old multiparous woman (G4P3L2) presents to a sub-centre in rural Maharashtra at 6 weeks postpartum with complaints of vaginal bleeding and foul-smelling discharge. On examination, she is febrile (38.5°C), tachycardic (HR 110 bpm), and has a tender, boggy uterus. The sub-centre health worker suspects puerperal sepsis and refers her to the district hospital. The woman's previous two children died within the first month of life from neonatal complications. Which RCH strategy is MOST critical to prevent similar adverse outcomes in her current newborn?