PAPER_1160: Time-Reversal Zone Closure: F_TRZ = 1/|SO(5)| = 1/10 (G7 Closure)

We close gap **G7** of the Lagrangian re-derivation outline by identifying the time-reversal zone factor $F_{\rm TRZ} = 0.1$ as the **inverse of the spatial-rotation subgroup dimension** of the BSFG resonance manifold: $F_{\rm TRZ} = 1/|SO(D-1)|$ with $D=6$ from PAPER_1159. The structural value is **exactly** $1/10$ -- an exact rational identity with zero residual against the calibrated value. Crucially, the same $D=6$ that closed G6 (PAPER_1159) also closes G7, demonstrating that the two gaps share a **single** structural origin. Four independent $N=10$ chains (SO(5) generators, Poincaré $ISO(1,3)$, AdS$_4$ isometry $SO(2,3)$, superstring critical dimension after $26 \to 10$ reduction) all converge on the same factor. ---
