feat(cli): scaffold scadalink audit command group (#23 M8)

src/ScadaLink.CLI/Commands/AuditCommands.cs

@@ -0,0 +1,45 @@
+using System.CommandLine;
+using System.CommandLine.Parsing;
+
+namespace ScadaLink.CLI.Commands;
+
+/// <summary>
+/// The <c>scadalink audit</c> command group (Audit Log #23 M8). Provides read access to
+/// the centralized append-only Audit Log via the Bundle B REST endpoints
+/// (<c>GET /api/audit/query</c>, <c>GET /api/audit/export</c>), plus a v1 no-op
+/// <c>verify-chain</c> placeholder for the deferred hash-chain tamper-evidence feature.
+/// </summary>
+public static class AuditCommands
+{
+    public static Command Build(Option<string> urlOption, Option<string> formatOption, Option<string> usernameOption, Option<string> passwordOption)
+    {
+        var command = new Command("audit") { Description = "Query and export the centralized audit log" };
+
+        command.Add(BuildQuery(urlOption, formatOption, usernameOption, passwordOption));
+        command.Add(BuildExport(urlOption, formatOption, usernameOption, passwordOption));
+        command.Add(BuildVerifyChain(urlOption, formatOption, usernameOption, passwordOption));
+
+        return command;
+    }
+
+    private static Command BuildQuery(Option<string> urlOption, Option<string> formatOption, Option<string> usernameOption, Option<string> passwordOption)
+    {
+        var cmd = new Command("query") { Description = "Query audit log events" };
+        cmd.SetAction((ParseResult result) => 0);
+        return cmd;
+    }
+
+    private static Command BuildExport(Option<string> urlOption, Option<string> formatOption, Option<string> usernameOption, Option<string> passwordOption)
+    {
+        var cmd = new Command("export") { Description = "Export audit log events to a file" };
+        cmd.SetAction((ParseResult result) => 0);
+        return cmd;
+    }
+
+    private static Command BuildVerifyChain(Option<string> urlOption, Option<string> formatOption, Option<string> usernameOption, Option<string> passwordOption)
+    {
+        var cmd = new Command("verify-chain") { Description = "Verify the audit log hash chain for a month" };
+        cmd.SetAction((ParseResult result) => 0);
+        return cmd;
+    }
+}