docs: add 1.3.0 changelog

CHANGELOG.md

@@ -0,0 +1,13 @@
+# Changelog
+
+## [1.3.0] — 2026-07-08
+
+### Changed
+
+- **`Unlocker` is now two capability methods.** `unlock_features` (drive
+  riplock / speed / OEM VID at drive-prep) and `unlock_bus` (bus-encryption
+  removal for the mounted disc) replace the single `matches()` + `unlock()`
+  contract. Each defaults to `NotApplicable`, so an unlocker implements only the
+  capabilities it actually provides.
+- **`DriveId` gains a `product_id` field** carrying the SCSI INQUIRY product
+  string, so consumers can match on it.