Carl Friedrich Gauss: Werke - Corrected Working Source Reconstruction Milestone

Additive corrected reconstruction working-source milestone. This publishes a source-backed first-pass original-language TeX snapshot in stable source-leaf order, with exact partial-volume and missing stable leaf lists. It is not a canonical critical edition, not an English translation, and not a complete Gauss author corpus. New reader PDFs are intentionally withheld because all-page QA proved systemic clipping/overlap in the inherited layout.