A 42-year-old man from a tribal area in Chhattisgarh presents to a health facility with fever, cough, and chest pain for 2 weeks. On examination, he is febrile (38.5°C), has crackles in the left lower lobe, and appears malnourished. A sputum smear is sent for acid-fast bacilli (AFB) testing. The facility has basic laboratory capacity, one doctor, and 20 outpatient beds. The patient is started on anti-tuberculous therapy and counseled on directly observed therapy (DOT). Which level of the Indian public health system is this facility most likely to be, and what is the primary role of this facility in TB control?