GCFT Observation Front: Consolidated Post-Derivation Test Programme, CDN-275–286

This upload consolidates the post-derivation General Coherence Field Theory observation front, covering CDN-275 through CDN-286. The bundle includes the individual art-edition PDFs and ZIP artifacts for the horizon boundary, Gaia DR4 gate, particle landscape, wide-binary test, Bullet/merging-cluster test, tidal-stream test, strong-lensing/H0 boundary, void test, programme registry, UDG test, high-redshift boundary, and the combined synthesis paper CDN-286: The Observation Front. Together these records turn the completed coherence-derivation arc into a cross-scale falsifiable test programme, distinguishing transparent regimes, consistency checks, locked predictions, orthogonality boundaries, and explicit failure gates.