Add governed orthophoto release promotion

CHANGELOG.md

@@ -7,6 +7,25 @@
 
 # Changelog
 
+## Sprint 231 Governed orthophoto release promotion (2026-07-17)
+
+- Added an operator-only `plan -> stage -> review -> apply` coordinator for one
+  bounded current Digitaal Vlaanderen orthophoto selection. It reuses and
+  revalidates the Sprint 230 catalog, WMS, WCS and flight-day preflight.
+- Stage performs exactly one bounded allowlisted WMS `GetMap`, retains the raw
+  response, normalizes a three-band EPSG:31370 GeoTIFF and creates a PNG review
+  preview. Every source, raster, preview, request and preflight identity is
+  SHA-256-bound under persistent operator evidence.
+- Review requires a named explicit approval. Apply requires exact plan and
+  review hashes, rechecks remote and local state, and uploads only the approved
+  GeoTIFF through the existing dataset upload/DatasetService transaction.
+- Added an explicit first-baseline transition for legacy
+  `most_recent_at_*` markers. It requires both the exact legacy marker and the
+  official edition; no existing Dataset is rewritten or deleted.
+- Made official `YYYY.NN` orthophoto Datasets take precedence over rolling
+  acquisition markers in source-catalog comparison. No API, migration,
+  scheduler, browser fetch or automatic refresh was added.
+
 ## Sprint 230 Governed orthophoto release preflight (2026-07-17)
 
 - Added an operator-only, read-only preflight for the current Digitaal