Geometric Origin of Zero-Point Motion from Spinor Holonomy and Finite-Resolution Time Readout

Preprint. Publicly released on Zenodo prior to journal submission. Version v2 update: cross-references and interface statements have been updated to reflect the split companion papers on (i) the rank-one representation theorem and (ii) the readout-layer protocol. The discussion connecting temporal residuals to readout-layer rescaling is rewritten to avoid dynamical interpretations. This preprint derives zero-point motion as a geometric consequence of spinor holonomy under limited-resolution time readout. The key mechanism is time quantization combined with a minimal phase/action discretization, yielding a non-vanishing residual motion even in the ground-state limit, without introducing ad hoc stochastic assumptions. The analysis is framed at the level of operational readout and geometric structure, and does not assume a specific gravitational coupling. Related records (companion papers): OTSUKA, A. (2026). Rank-One Representation of Measure Rescalings via Time-Leg Renormalization (Version v1). Zenodo. doi:10.5281/zenodo.18169039 OTSUKA, A. (2026). A Readout-Layer Rescaling Protocol for Reported Time and Volume: Interface Specification, Estimators, Uncertainty Propagation (Version v1). Zenodo. doi:10.5281/zenodo.18169181