fix: add missing license header

Signed-off-by: Fredrik Nordlander <fredrik.nordlander@digg.se>

Author: fredriknordlander

src/util/RapLPIssueHelpers.ts

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2025 Digg - Agency for Digital Government
+//
+// SPDX-License-Identifier: EUPL-1.2
+
 import type * as SpectralCore from '@stoplight/spectral-core';
 
 /**

src/util/RapLPSpecParseError.ts

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: 2025 Digg - Agency for Digital Government
+//
+// SPDX-License-Identifier: EUPL-1.2
 
 /**
  * Specialized error class that contains YAML/JSON parse information

src/util/prettifyOpenAPIErrors.ts

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2025 Digg - Agency for Digital Government
+//
+// SPDX-License-Identifier: EUPL-1.2
+
 /**
  * 
  * @param ptr 

tests/unit/integration/validateRunner.mjs

@@ -1,4 +1,7 @@
-// tests/unit/integration/validateRunner.mjs
+// SPDX-FileCopyrightText: 2025 Digg - Agency for Digital Government
+//
+// SPDX-License-Identifier: EUPL-1.2
+
 import path from 'path';
 
 async function main() {

tests/unit/issueHelper.test.ts

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2025 Digg - Agency for Digital Government
+//
+// SPDX-License-Identifier: EUPL-1.2
+
 import { Issue, sortIssues,consolidateIssues } from '../../src/util/RapLPIssueHelpers.js';
 import { spectralDiagnosticsToIssuesSimple } from '../../src/util/RapLPIssueHelpers.js';
 import type * as SpectralCore from '@stoplight/spectral-core';

tests/unit/parseApiSpecInput.integration.test.ts

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: 2025 Digg - Agency for Digital Government
+//
+// SPDX-License-Identifier: EUPL-1.2
 
 import { execFile } from 'child_process';
 import { promisify } from 'util';