Added the catalogue models and seed to support phase 4 of the POC prototype in the Persistence package.

Packages/Persistence/Sources/Public/Models/Passkey.swift

@@ -0,0 +1,29 @@
+/// A `Sendable` snapshot of a WebAuthn credential registered to an account.
+public struct Passkey: Sendable, Equatable {
+
+    // MARK: Properties
+
+    /// The credential's identifier, base64url-encoded without padding.
+    public let credentialID: String
+    /// The credential's public key, COSE-encoded.
+    public let publicKey: [UInt8]
+    /// The authenticator's signature counter as last seen; a lower one later on signals a cloned authenticator.
+    public let signCount: UInt32
+    /// The account the credential signs in.
+    public let user: User
+
+    // MARK: Initializers
+
+    public init(
+        credentialID: String,
+        publicKey: [UInt8],
+        signCount: UInt32,
+        user: User
+    ) {
+        self.credentialID = credentialID
+        self.publicKey = publicKey
+        self.signCount = signCount
+        self.user = user
+    }
+
+}