chore: enable Issue management automation

.github/issue-management/policy.test.mjs

@@ -4,6 +4,7 @@ import test from 'node:test'
 import {
   countVisibleUnits,
   parseReferences,
+  retainIssueReferences,
   requiresPullRequestPolicy,
   validateBody,
   validateIssue,
@@ -117,6 +118,24 @@ test('separates resolving and informational references', () => {
   )
 })
 
+test('does not treat pull request references as Issue associations', () => {
+  const references = {
+    all: [123, 1180, 1181],
+    resolving: [123, 1180],
+    related: [1181],
+  }
+  const issues = new Map([
+    [1180, {}],
+    [1181, {}],
+  ])
+
+  assert.deepEqual(retainIssueReferences(references, issues), {
+    all: [1180, 1181],
+    resolving: [1180],
+    related: [1181],
+  })
+})
+
 test('allows informational references without cross-object constraints', () => {
   const errors = validatePullRequest({
     isDraft: false,