URTD: Dynamics of the Uncertainty Boundary

version note — v2.3

This version applies prose tightening and equation formatting cleanup throughout. No structural changes, no mathematical changes, and no modifications to the proof chain. The duplicate conclusion block present in v2.2 has been removed. Equation notation is now consistent (wedge form throughout). One equation formatting error in Section 6.3 is corrected. Minor phrasing adjustments in Sections 6.4, 6.10, and the empirical hierarchy table bring the paper into alignment with the URT writing standard applied across the program.