fix(cicd): surface taskrun log read failures

scripts/native/cicd/taskrun-drilldown.mjs

@@ -59,8 +59,12 @@ async function main() {
   for (const container of logContainers) {
     const name = container.containerName || container.name;
     if (!podName || !name) continue;
-    const text = await readPodLog(podName, name, logsTailLines, perContainerBytes);
+    const read = await readPodLog(podName, name, logsTailLines, perContainerBytes);
+    const text = read.tail || "";
     logs.push({
+      ok: read.ok,
+      degradedReason: read.degradedReason,
+      message: read.message,
       pod: podName,
       container: name,
       lineCount: text.length === 0 ? 0 : text.split(/\r?\n/u).filter((line) => line.length > 0).length,
@@ -70,8 +74,16 @@ async function main() {
     });
   }
   const timing = lastTiming(logs);
+  const logFailures = logs.filter((item) => item.ok === false);
   console.log(JSON.stringify({
-    ok: true,
+    ok: logFailures.length === 0,
+    degradedReason: logFailures.length === 0 ? null : "log-read-failed",
+    errors: logFailures.map((item) => ({
+      pod: item.pod,
+      container: item.container,
+      degradedReason: item.degradedReason,
+      message: item.message,
+    })),
     taskRun: {
       name: metadata.name || null,
       namespace: metadata.namespace || namespace,
@@ -222,9 +234,15 @@ function selectLogContainers(containers) {
 async function readPodLog(podName, container, tailLines, limitBytes) {
   const path = `/api/v1/namespaces/${encodeURIComponent(namespace)}/pods/${encodeURIComponent(podName)}/log?container=${encodeURIComponent(container)}&tailLines=${tailLines}&limitBytes=${limitBytes}`;
   try {
-    return tailBytes(await getText(path, false), limitBytes);
+    const text = tailBytes(await getText(path, false), limitBytes);
+    return { ok: true, degradedReason: null, message: null, tail: text };
   } catch (error) {
-    return `log-read-failed: ${shortText(error?.message || String(error))}`;
+    return {
+      ok: false,
+      degradedReason: isNotFoundError(error) ? "log-not-found" : error instanceof KubeReadError ? error.reason : "log-read-failed",
+      message: shortText(error?.message || String(error)),
+      tail: "",
+    };
   }
 }