write
suspend fun writeFeatureCoverage(content: GpkgContent, z: Int, x: Int, y: Int, etag: String?, httpLastModified: String?, validatedAt: Long, isEmpty: Boolean): ERROR CLASS: Unresolved name: withContext
Upsert the coverage row for the tile region (z, x, y) — validators, validatedAt (epoch- millis just confirmed fresh) and the isEmpty negative-cache flag. Creates / declares the side table on first use.