Atomic Clocks Structural Alignment

A minimal, architecture‑agnostic structural framework aligning atomic timekeeping with Resonance‑Time (RT) and Validated Spacetime (vST). The paper introduces a triadic decomposition of atomic clock architectures, a resonance‑based definition of the second, structural drift‑detection invariants, and a non‑disruptive roadmap for adoption. Fully compatible with existing SI standards.