v1.0.0 — Public template: two-wave multi-estimand thesis extension

First public release of a toy-data-only methods template extending a two-wave MSc thesis workflow with robustness checks. Track A (multi-ROI): QC-safe two-wave build + age timeline; within-person coupling (cwc/pm); multi-estimand change engine (Δ / %Δ / log / |Δ|); BH–FDR families; targeted mediation (ACME/ADE) template. Track B (single ROI): QC-safe two-wave build; descriptive GAM trajectory; LME Age0×Time; ΔΔ change-link to outcome. Includes Quarto runners for Track A, Track B, and repo-level run-all. No real datasets, no participant-level exports, and no unpublished results are included.