write
suspend fun writeFeatureTile(content: GpkgContent, z: Int, x: Int, y: Int, rows: List<GpkgFeatureRow>, sector: Sector? = null): ERROR CLASS: Unresolved name: withContext
Replace tile (z, x, y)'s features in the flat store and stamp coverage. Rows that carry a stable GpkgFeatureRow.uid upsert by it (so a feature straddling tile borders dedupes to one row); id-less rows replace everything in the tile's bbox. An empty list clears the region and records the negative cache (is_empty) in ww_feature_coverage — no null-geometry sentinel.