Design Blueprint: An X-Ray Pulsar Timing Observatory Testing Whether Photon Travel Times Follow the Stated Transit Relation on Interplanetary Paths

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24142476): This paper presents a space mission design, computed from stated assumptions and not measured, built to measure one quantity: the systematic timing residual predicted by the transit relation over a one-year baseline, for which the design case adopts 145 nanoseconds. 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.