Refactoring

Sources/DataRaft/Aliases/VersionRepresentable.swift

@@ -0,0 +1,35 @@
+import Foundation
+
+/// A type that describes a database schema version.
+///
+/// ## Overview
+///
+/// Types conforming to this alias can be compared, checked for equality, hashed, and safely used
+/// across concurrent contexts. Such types are typically used to track and manage schema migrations.
+///
+/// ## Conformance
+///
+/// Conforming types must implement:
+/// - `Equatable` — for equality checks
+/// - `Comparable` — for ordering versions
+/// - `Hashable` — for dictionary/set membership
+/// - `Sendable` — for concurrency safety
+///
+/// ## Usage
+///
+/// Use this type alias when defining custom version types for use with ``VersionStorage``.
+///
+/// ```swift
+/// struct SemanticVersion: VersionRepresentable {
+///     let major: Int
+///     let minor: Int
+///     let patch: Int
+///
+///     static func < (lhs: Self, rhs: Self) -> Bool {
+///         if lhs.major != rhs.major { return lhs.major < rhs.major }
+///         if lhs.minor != rhs.minor { return lhs.minor < rhs.minor }
+///         return lhs.patch < rhs.patch
+///     }
+/// }
+/// ```
+public typealias VersionRepresentable = Equatable & Comparable & Hashable & Sendable