Improving stale issue workflow (#45767)

Refactor stale issue formatting to use HTML lists for improved rendering
in GitHub Actions summary; update workflow dependencies to latest
versions.

Example run (see summary):
https://github.com/fleetdm/fleet/actions/runs/26101161627

<!-- Add the related story/sub-task/bug number, like Resolves #123, or
remove if NA -->
**Related issue:** Resolves #45700 


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-->

## Summary by CodeRabbit

* **Chores**
* Updated GitHub Actions and automation dependencies to latest versions
  * Improved stale issue management workflow formatting and logic

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[![Review Change
Stack](https://storage.googleapis.com/coderabbit_public_assets/review-stack-in-coderabbit-ui.svg)](https://app.coderabbit.ai/change-stack/fleetdm/fleet/pull/45767?utm_source=github_walkthrough&utm_medium=github&utm_campaign=change_stack)

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.github/scripts/stale-fleetie-issues.js

@@ -314,23 +314,17 @@ async function run({ github, context, core }) {
     }
   }
 
-  const fmt = (list) =>
-    list.length
-      ? list
-          .map(
-            (e) =>
-              `- [#${e.number}](${e.url}) by @${
-                e.author
-              } (idle ${e.idleDays.toFixed(1)}d)`
-          )
-          .join("\n")
-      : "_none_";
-  const fmtErrors = (list) =>
-    list.length
-      ? list.map((e) => `- #${e.number} (${e.phase}): ${e.message}`).join("\n")
-      : "_none_";
+  // Each entry is an HTML <li> so it renders correctly inside <ul>. We use raw <a> tags rather
+  // than markdown links because GitHub Actions summary surrounds list content with HTML blocks
+  // (from addHeading / addList), which suspends markdown parsing for child content — markdown
+  // bullets via addRaw collapse onto one line in that context.
+  const fmtItem = (e) =>
+    `<a href="${e.url}">#${e.number}</a> by @${e.author} (idle ${e.idleDays.toFixed(1)}d)`;
+  const fmtErrorItem = (e) => `#${e.number} (${e.phase}): ${e.message}`;
+  const appendList = (s, items, fn) =>
+    items.length ? s.addList(items.map(fn)) : s.addRaw("_none_").addEOL();
 
-  await core.summary
+  let summary = core.summary
     .addHeading("Fleetie stale-issue closer")
     .addRaw(`Mode: **${dryRun ? "dry-run" : "live"}**`)
     .addBreak()
@@ -347,18 +341,15 @@ async function run({ github, context, core }) {
       `Un-staled this run (activity after label): ${unstaled.length}`,
       `Errors: ${errored.length}`,
     ])
-    .addHeading("Marked stale", 3)
-    .addRaw(fmt(staled))
-    .addBreak()
-    .addHeading("Closed", 3)
-    .addRaw(fmt(closed))
-    .addBreak()
-    .addHeading("Un-staled (activity after label)", 3)
-    .addRaw(fmt(unstaled))
-    .addBreak()
-    .addHeading("Errors", 3)
-    .addRaw(fmtErrors(errored))
-    .write();
+    .addHeading("Marked stale", 3);
+  summary = appendList(summary, staled, fmtItem);
+  summary = summary.addHeading("Closed", 3);
+  summary = appendList(summary, closed, fmtItem);
+  summary = summary.addHeading("Un-staled (activity after label)", 3);
+  summary = appendList(summary, unstaled, fmtItem);
+  summary = summary.addHeading("Errors", 3);
+  summary = appendList(summary, errored, fmtErrorItem);
+  await summary.write();
 
   // Returned for test assertions only. The production caller (the workflow) discards this and
   // reads `core.summary` instead.

.github/workflows/close-stale-fleetie-initiated-issues.yml

@@ -46,17 +46,17 @@ jobs:
       issues: write
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76 # v2.14.0
+        uses: step-security/harden-runner@ab7a9404c0f3da075243ca237b5fac12c98deaa5 # v2.19.3
         with:
           egress-policy: audit
 
       - name: Checkout repo
-        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
 
       - name: Set up Node
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # 4.4.0
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: '24'
 
@@ -69,7 +69,7 @@ jobs:
         run: node .github/scripts/build-fleetie-handles.js
 
       - name: Stale and close Fleetie-authored issues
-        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         env:
           FLEETIE_HANDLES_FILE: ${{ runner.temp }}/fleeties.txt
           # Force dry-run for every event other than workflow_dispatch.

.github/workflows/test-stale-fleetie-issue-scripts.yml

@@ -46,17 +46,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76 # v2.14.0
+        uses: step-security/harden-runner@ab7a9404c0f3da075243ca237b5fac12c98deaa5 # v2.19.3
         with:
           egress-policy: audit
 
       - name: Checkout repo
-        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
 
       - name: Set up Node
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # 4.4.0
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: '24'