Filter Variants: Optimization metrics and filtered station observations for oats (Avena sativa, DWD Plant ID 208) in Germany

Filter-variant optimization outputs of the PhenoPhaseR pipeline for oats (Avena sativa L., DWD Plant ID 208), for Germany over 1993–2025. The intermediate station-filtering product: per-phase OPT_* optimisation metrics and the selected filtered station observations (SHP_*). No interpolated raster and no uncertainty layer. Pipeline Steps 5-6. Provenance: generated with PhenoPhaseR (software concept DOI 10.5281/zenodo.18743008). AGROVOC subject anchoring (crop species + family concepts) is carried identically in the accompanying RO-Crate's schema:about.