fix(runreport): resolve "failed" label id by name instead of hardcoding 1

The label id was hardcoded (failedLabel = 1), so deleting/recreating the
label in x9/xetup-runs (new id) would make issue creation drop the label or
fail. Look the id up by name at runtime; on any lookup failure (network,
auth, decode, or label absent) file the issue unlabeled rather than not at
all. Verified end-to-end: label resolved and attached via lookup.

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

CLAUDE.md

@@ -164,7 +164,7 @@ xetup.exe start
 
 ### Run failure reporting (runreport)
 - On any ERROR step, files an issue in the private `x9/xetup-runs` repo; successful runs stay silent
-- Title `FAILED <host> - <version> - <date>`, label `failed`, body = step table + tail-capped Deploy.log (60 KB)
+- Title `FAILED <host> - <version> - <date>`, label `failed` (id resolved by name at runtime), body = step table + tail-capped Deploy.log (60 KB)
 - Filed by the `xetup-bot` Forgejo account (collaborator on xetup-runs only) via a `write:issue` token
 - Token + version injected at build via `-ldflags -X internal/buildinfo.{RunsToken,Version}`; empty token -> no-op
 - Best-effort/non-blocking (15s HTTP timeout, 3 retries); the email report is the fallback

internal/runreport/runreport.go

@@ -19,9 +19,13 @@ import (
 )
 
 const (
-	// Forgejo API + web base for the runs tracker.
-	issuesAPI   = "https://git.xetup.x9.cz/api/v1/repos/x9/xetup-runs/issues"
-	failedLabel = 1 // id of the "failed" label in x9/xetup-runs
+	// Forgejo API endpoints for the runs tracker.
+	issuesAPI = "https://git.xetup.x9.cz/api/v1/repos/x9/xetup-runs/issues"
+	labelsAPI = "https://git.xetup.x9.cz/api/v1/repos/x9/xetup-runs/labels?limit=50"
+
+	// labelName is looked up by name at runtime (not a hardcoded id) so the
+	// label surviving a delete/recreate with a new id does not break filing.
+	labelName = "failed"
 
 	// Cap the inline log so a huge Deploy.log does not bloat the issue; keep
 	// the tail (the end is where the failure and its context live).
@@ -52,17 +56,20 @@ func Report(results []report.StepResult, logPath string) string {
 	title := fmt.Sprintf("FAILED %s - %s - %s", hostname, buildinfo.Version, now)
 	body := buildBody(results, hostname, now, logPath)
 
-	payload, err := json.Marshal(map[string]any{
-		"title":  title,
-		"body":   body,
-		"labels": []int{failedLabel},
-	})
+	client := &http.Client{Timeout: 15 * time.Second}
+
+	// Look up the label id by name; on any failure file the issue unlabeled
+	// rather than not at all.
+	fields := map[string]any{"title": title, "body": body}
+	if ids := lookupLabelIDs(client); len(ids) > 0 {
+		fields["labels"] = ids
+	}
+	payload, err := json.Marshal(fields)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "[WARN] runreport: marshal failed: %v\n", err)
 		return ""
 	}
 
-	client := &http.Client{Timeout: 15 * time.Second}
 	delays := []time.Duration{0, 2 * time.Second, 5 * time.Second}
 	for attempt, delay := range delays {
 		if delay > 0 {
@@ -107,6 +114,44 @@ func postIssue(client *http.Client, payload []byte) (string, error) {
 	return out.HTMLURL, nil
 }
 
+// lookupLabelIDs resolves labelName to its id in the runs repo. Returns nil on
+// any error (network, auth, decode, or label absent) so the caller files the
+// issue without a label instead of failing.
+func lookupLabelIDs(client *http.Client) []int {
+	req, err := http.NewRequest(http.MethodGet, labelsAPI, nil)
+	if err != nil {
+		return nil
+	}
+	req.Header.Set("Authorization", "token "+buildinfo.RunsToken)
+
+	resp, err := client.Do(req)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "[WARN] runreport: label lookup failed: %v\n", err)
+		return nil
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		fmt.Fprintf(os.Stderr, "[WARN] runreport: label lookup status %s\n", resp.Status)
+		return nil
+	}
+
+	var labels []struct {
+		ID   int    `json:"id"`
+		Name string `json:"name"`
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&labels); err != nil {
+		fmt.Fprintf(os.Stderr, "[WARN] runreport: label decode failed: %v\n", err)
+		return nil
+	}
+	for _, l := range labels {
+		if l.Name == labelName {
+			return []int{l.ID}
+		}
+	}
+	fmt.Fprintf(os.Stderr, "[WARN] runreport: label %q not found; filing unlabeled\n", labelName)
+	return nil
+}
+
 // buildBody renders the issue markdown: a summary line, a per-step table, and
 // the (tail-capped) Deploy.log in a collapsed block.
 func buildBody(results []report.StepResult, hostname, now, logPath string) string {