fix: make agentrun trigger source fetch resilient

scripts/src/agentrun.ts

@@ -148,14 +148,34 @@ async function status(config: UniDeskConfig): Promise<Record<string, unknown>> {
 
 async function triggerCurrent(config: UniDeskConfig, options: TriggerOptions): Promise<Record<string, unknown>> {
   const source = await capture(config, g14SourceRoute, ["script", "--", [
-    "set -eu",
+    "set -u",
     "cd /root/agentrun-v01",
-    "git fetch origin v0.1",
+    "fetch_status=succeeded",
-    "git merge --ff-only refs/remotes/origin/v0.1",
+    "fetch_output=$(git fetch origin v0.1 2>&1)",
+    "fetch_code=$?",
+    "if [ \"$fetch_code\" -ne 0 ]; then fetch_status=failed; fi",
+    "printf 'fetchStatus=%s\\n' \"$fetch_status\"",
+    "printf 'fetchExitCode=%s\\n' \"$fetch_code\"",
+    "printf 'fetchOutput=%s\\n' \"$fetch_output\" | tail -n 8",
+    "origin_ref=$(git rev-parse refs/remotes/origin/v0.1 2>/dev/null || true)",
+    "merge_status=skipped",
+    "merge_code=0",
+    "if [ -n \"$origin_ref\" ]; then",
+    "  merge_output=$(git merge --ff-only refs/remotes/origin/v0.1 2>&1)",
+    "  merge_code=$?",
+    "  if [ \"$merge_code\" -eq 0 ]; then merge_status=succeeded; else merge_status=failed; fi",
+    "  printf 'mergeStatus=%s\\n' \"$merge_status\"",
+    "  printf 'mergeExitCode=%s\\n' \"$merge_code\"",
+    "  printf 'mergeOutput=%s\\n' \"$merge_output\" | tail -n 8",
+    "  if [ \"$merge_code\" -ne 0 ]; then exit \"$merge_code\"; fi",
+    "else",
+    "  printf 'mergeStatus=skipped-origin-missing\\n'",
+    "  printf 'originRefMissing=true\\n'",
+    "fi",
     "printf 'sourceCommit='",
     "git rev-parse HEAD",
     "printf 'originV01='",
-    "git rev-parse refs/remotes/origin/v0.1",
+    "git rev-parse refs/remotes/origin/v0.1 2>/dev/null || true",
     "git status --short --branch",
   ].join("\n")]);
   const sourceCommit = matchLine(source.stdout, "sourceCommit=");