Morphological and physical feature extraction for candidate source classification. The morphological features were computed by partitioning the candidate ROI into a cross-shaped layout aligned with the instrument PSF, including the central region, the axial arms, and corner regions. These features summarize photon counts, regional means and densities, a global standard deviation, and a PSF fitting consistency score. The physical features include aperture photometry, S/N, a power-law spectral slope, and the FWHM.