ci: retry transient network errors when publishing the release

The publish step died with "fetch failed: ECONNRESET" mid-run, leaving a
half-created release (no version.txt asset → the Pi got 404s). Wrap the
Gitea API calls in a small retry (rfetch) so a flaky connection doesn't
leave the rolling release incomplete.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitea/scripts/publish-release.mjs

@@ -16,6 +16,21 @@ const VERSION = SHA.slice(0, 8);
 const API = `${SERVER}/api/v1/repos/${REPO}`;
 const H = { Authorization: `token ${TOKEN}` };
 
+// The runner's network to Gitea is flaky (ECONNRESET mid-publish leaves a
+// half-created release). Retry transient fetch failures so the multi-step
+// publish is atomic-enough in practice.
+const rfetch = async (url, opts = {}, tries = 4) => {
+  for (let i = 1; ; i++) {
+    try {
+      return await fetch(url, opts);
+    } catch (e) {
+      if (i >= tries) throw e;
+      console.log(`fetch ${url} failed (${e.cause?.code || e.message}); retry ${i}/${tries - 1}`);
+      await new Promise((r) => setTimeout(r, 1000 * i));
+    }
+  }
+};
+
 const ok = async (r) => {
   if (!r.ok) throw new Error(`${r.status} ${r.url}\n${await r.text()}`);
   const t = await r.text();
@@ -31,14 +46,14 @@ const files = {
 };
 
 // Roll the release forward to this commit: delete the old release + tag.
-const existing = await fetch(`${API}/releases/tags/${TAG}`, { headers: H });
+const existing = await rfetch(`${API}/releases/tags/${TAG}`, { headers: H });
 if (existing.ok) {
   const rel = await existing.json();
-  await fetch(`${API}/releases/${rel.id}`, { method: 'DELETE', headers: H });
+  await rfetch(`${API}/releases/${rel.id}`, { method: 'DELETE', headers: H });
 }
-await fetch(`${API}/tags/${TAG}`, { method: 'DELETE', headers: H }); // ignore if absent
+await rfetch(`${API}/tags/${TAG}`, { method: 'DELETE', headers: H }); // ignore if absent
 
-const rel = await ok(await fetch(`${API}/releases`, {
+const rel = await ok(await rfetch(`${API}/releases`, {
   method: 'POST',
   headers: { ...H, 'Content-Type': 'application/json' },
   body: JSON.stringify({
@@ -53,7 +68,7 @@ const rel = await ok(await fetch(`${API}/releases`, {
 for (const [name, buf] of Object.entries(files)) {
   const fd = new FormData();
   fd.append('attachment', new Blob([buf]), name);
-  await ok(await fetch(`${API}/releases/${rel.id}/assets?name=${encodeURIComponent(name)}`, {
+  await ok(await rfetch(`${API}/releases/${rel.id}/assets?name=${encodeURIComponent(name)}`, {
     method: 'POST', headers: H, body: fd,
   }));
   console.log(`uploaded ${name}`);