Authenticated encryption for enterprise secrets (#1078)

app/MindWork AI Studio/Tools/EnterpriseEncryptionFormat.cs

@@ -0,0 +1,19 @@
+namespace AIStudio.Tools;
+
+/// <summary>
+/// The formats in which AI Studio encrypts the secrets of enterprise configuration plugins.
+/// </summary>
+public enum EnterpriseEncryptionFormat
+{
+    /// <summary>
+    /// "ENC:v1:", which every version of AI Studio reads. It is not authenticated, so a wrong
+    /// encryption secret is not always detected.
+    /// </summary>
+    V1,
+
+    /// <summary>
+    /// "ENC:v2:", which is authenticated: AI Studio refuses every value encrypted with another
+    /// secret or changed afterward. Versions before v26.10.1 cannot read it.
+    /// </summary>
+    V2,
+}