Added the catalogue models and seed to support phase 5 of the POC prototype in the Persistence package.

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

@@ -0,0 +1,67 @@
+import FluentKit
+import Foundation
+
+/// A FluentKit model of a single `series` row: a run of issues in the catalogue.
+final class SeriesRecord: Model, @unchecked Sendable {
+
+    // MARK: Properties
+
+    static let schema = "series"
+
+    @ID(key: .id)
+    var id: UUID?
+
+    @Field(key: "slug")
+    var slug: String
+
+    @Field(key: "name")
+    var name: String
+
+    @Field(key: "publisher")
+    var publisher: String
+
+    @Field(key: "years")
+    var years: String
+
+    @Field(key: "issue_count")
+    var issueCount: Int
+
+    @Field(key: "blurb")
+    var blurb: String
+
+    // MARK: Initializers
+
+    init() {}
+
+    init(
+        _ series: Series
+    ) {
+        self.slug = series.slug
+        self.name = series.name
+        self.publisher = series.publisher
+        self.years = series.years
+        self.issueCount = series.issueCount
+        self.blurb = series.blurb
+    }
+
+}
+
+// MARK: - Extensions
+
+extension SeriesRecord {
+
+    // MARK: Computed
+
+    /// The `Sendable` snapshot of the record.
+    var snapshot: Series {
+        .init(
+            slug: slug,
+            name: name,
+            publisher: publisher,
+            years: years,
+            issueCount: issueCount,
+            blurb: blurb
+        )
+    }
+
+}