Begin by deboning the chicken at room temperature (25°C). Place chicken breast-side down and carefully separate meat from bones while keeping skin intact (Ilagay ang manok nang pataob at maingat na ihiwalay ang laman sa buto habang iniingatan ang balat). Reserve carcass for stock.
Mix marinade of calamansi juice, soy sauce, and pepper. Marinate chicken in refrigerator (4°C) for 1 hour (Ihalo ang katas ng kalamansi, toyo, at paminta. Ibabad ang manok ng isang oras sa refrigerator).
While chicken marinates, prepare the stuffing (Ihanda ang palaman): Combine ground pork, drained crushed pineapple, grated onion, shredded carrot, breadcrumbs, cheese, raisins, banana ketchup, beaten eggs, salt, and pepper. Mix thoroughly but gently. Keep mixture cold, below 4°C (Paghaluin nang maingat ang lahat ng sangkap at panatilihing malamig).
Pat marinated chicken dry. Stuff with half the meat mixture, place hard-boiled eggs in center, then add remaining stuffing (Punasan ang manok at ilagay ang kalahating bahagi ng palaman, ilagay ang matigas na itlog sa gitna, at idagdag ang natitirang palaman). Sew openings closed and tie legs together.
Preheat oven to 190°C (375°F). Brush chicken with mayonnaise (Pahiran ng mayonnaise ang manok). Place in roasting pan and cook for 1.5 hours (Ilagay sa roasting pan at lutuin ng 1.5 oras).
In the final 20 minutes, baste with melted butter (Sa huling 20 minuto, pahiran ng tunaw na mantikilya). Check internal temperature reaches 74°C (165°F) for food safety (Siguraduhing umabot sa 74°C ang init sa loob).
Let rest for 15 minutes before slicing (Palamigin ng 15 minuto bago hiwahin). When reheating, ensure temperature reaches 74°C (165°F) throughout.