Bump SDK version to 0.2.68 (matrix-rust-sdk to e76b8f7e1591205e29165dd93dde9b77798bc971)

Author: github-actions

buildSrc/src/main/kotlin/BuildVersionsSDK.kt

@@ -1,5 +1,5 @@
 object BuildVersionsSDK {
 	const val majorVersion = 0
 	const val minorVersion = 2
-	const val patchVersion = 67
+	const val patchVersion = 68
 }

sdk/sdk-android/src/main/kotlin/uniffi/matrix_sdk_crypto/matrix_sdk_crypto.kt

@@ -1410,7 +1410,18 @@ enum class UtdCause {
      * data was obtained from an insecure source (imported from a file,
      * obtained from a legacy (asymmetric) backup, unsafe key forward, etc.)
      */
-    UNKNOWN_DEVICE;
+    UNKNOWN_DEVICE,
+    /**
+     * We are missing the keys for this event, but it is a "device-historical"
+     * message and no backup is accessible or usable.
+     *
+     * Device-historical means that the message was sent before the current
+     * device existed (but the current user was probably a member of the room
+     * at the time the message was sent). Not to
+     * be confused with pre-join or pre-invite messages (see
+     * [`UtdCause::SentBeforeWeJoined`] for that).
+     */
+    HISTORICAL_MESSAGE;
     companion object
 }