Design Blueprint: Aldred Shear Densitometer: A Non-Contact Sensor Reading Density Against the Shear Bound

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24123387): The device is a densitometer whose sensing element is a small spin-polarised torsional resonator mounted outside the vessel wall, its resonant frequency shifting, under the stated coupling model, in proportion to the density of the material within its sensing volume. Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.