fix(mcp): exclude archived records

backend/tests/mcpArchivedResults.test.ts

@@ -0,0 +1,37 @@
+import assert from "node:assert/strict"
+import test from "node:test"
+import { mcpTools } from "../src/mcp/registry"
+import { asToolResult } from "../src/mcp/result"
+
+test("removes archived records from MCP text and structured output", () => {
+    const result = asToolResult({
+        rows: [
+            { id: 1, archived: false, name: "Aktiv" },
+            { id: 2, archived: true, name: "Archiviert" },
+        ],
+        nested: {
+            current: { id: 3, archived: false },
+            previous: { id: 4, archived: true },
+        },
+    })
+
+    assert.deepEqual(result.structuredContent, {
+        rows: [{ id: 1, archived: false, name: "Aktiv" }],
+        nested: { current: { id: 3, archived: false } },
+    })
+    assert.deepEqual(JSON.parse(result.content[0].text), result.structuredContent)
+})
+
+test("does not expose a singular archived record", () => {
+    const result = asToolResult({ task: { id: 1, archived: true } })
+
+    assert.deepEqual(result.structuredContent, {})
+    assert.deepEqual(JSON.parse(result.content[0].text), {})
+})
+
+test("does not advertise includeArchived on MCP tools", () => {
+    for (const tool of mcpTools) {
+        const properties = (tool.inputSchema.properties || {}) as Record<string, unknown>
+        assert.equal(properties.includeArchived, undefined, tool.name)
+    }
+})