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

Packages/Persistence/Sources/Internal/Models/PasskeyRecord.swift

@@ -0,0 +1,69 @@
+import FluentKit
+import Foundation
+
+/// A FluentKit model of a single `passkeys` row: a WebAuthn credential registered to an account.
+final class PasskeyRecord: Model, @unchecked Sendable {
+
+    // MARK: Properties
+
+    static let schema = "passkeys"
+
+    @ID(key: .id)
+    var id: UUID?
+
+    @Parent(key: "user_id")
+    var user: UserRecord
+
+    /// The credential's identifier, base64url-encoded without padding.
+    @Field(key: "credential_id")
+    var credentialID: String
+
+    /// The credential's public key, COSE-encoded, as base64.
+    @Field(key: "public_key")
+    var publicKey: String
+
+    @Field(key: "sign_count")
+    var signCount: Int
+
+    @Field(key: "created_at")
+    var createdAt: Date
+
+    // MARK: Initializers
+
+    init() {}
+
+    init(
+        userID: UUID,
+        credentialID: String,
+        publicKey: [UInt8],
+        signCount: UInt32,
+        at date: Date
+    ) {
+        self.$user.id = userID
+        self.credentialID = credentialID
+        self.publicKey = Data(publicKey).base64EncodedString()
+        self.signCount = Int(signCount)
+        self.createdAt = date
+    }
+
+}
+
+// MARK: - Extensions
+
+extension PasskeyRecord {
+
+    // MARK: Computed
+
+    /// The `Sendable` snapshot of the saved record; its user must be eager-loaded.
+    var snapshot: Passkey {
+        get throws {
+            .init(
+                credentialID: credentialID,
+                publicKey: Array(Data(base64Encoded: publicKey) ?? .init()),
+                signCount: UInt32(clamping: signCount),
+                user: try user.snapshot
+            )
+        }
+    }
+
+}