fix(stale-claims): avoid SIGPIPE 141 — pass file path не pipe

Root cause: `cat $ISSUES_TMP | python3 <<EOF ... sys.exit(0)` — Python exits
0 early, cat получает SIGPIPE, set -o pipefail → script exits 141 = failure.

Fix: передача file path через env var вместо stdin pipe. Python читает файл
напрямую. No pipe → no SIGPIPE.

Verified локально на VPS с bot-qa token: exit 0, '[OK] 0 wip issues —
nothing to do'.

Also remove diagnostic steps from workflow (added в PR #611, нужно для
поиска root cause, теперь убираем).

Refs: PR #611 (diagnostic), runs #1514-1520 failures.

.forgejo/workflows/stale-claims.yml

@@ -28,18 +28,6 @@ jobs:
       - name: Checkout repo
         uses: actions/checkout@v4
 
-      - name: Diagnostic — runner environment
-        run: |
-          echo "=== runner environment ==="
-          echo "shell: $SHELL"
-          echo "bash: $(bash --version | head -1)"
-          echo "python3: $(python3 --version 2>&1 || echo 'NOT INSTALLED')"
-          echo "curl: $(curl --version | head -1)"
-          echo "mktemp: $(mktemp --version | head -1 2>&1 || echo 'no --version')"
-          echo "pwd: $(pwd)"
-          echo "ls scripts/: $(ls scripts/ 2>&1)"
-          echo "script exists: $(test -f scripts/cleanup-stale-claims.sh && echo yes || echo no)"
-
       - name: Run cleanup script
         env:
           FORGEJO_TOKEN: ${{ secrets.FORGEJO_BOT_QA_TOKEN }}
@@ -47,14 +35,5 @@ jobs:
           FORGEJO_REPO: lekss361/gendesign
           STALE_HOURS: 4
         run: |
-          echo "=== env check ==="
-          echo "FORGEJO_TOKEN length: ${#FORGEJO_TOKEN}"
-          echo "FORGEJO_URL: $FORGEJO_URL"
-          echo "FORGEJO_REPO: $FORGEJO_REPO"
-          echo "STALE_HOURS: $STALE_HOURS"
-          echo "=== check token works ==="
-          curl -sS -H "Authorization: token $FORGEJO_TOKEN" "$FORGEJO_URL/api/v1/user" | head -c 200
-          echo ""
-          echo "=== run script with -x trace ==="
           chmod +x scripts/cleanup-stale-claims.sh
-          bash -x scripts/cleanup-stale-claims.sh
+          ./scripts/cleanup-stale-claims.sh

scripts/cleanup-stale-claims.sh

@@ -65,8 +65,10 @@ for PAGE in 1 2 3 4 5 6 7 8 9 10; do
   fi
 done
 
-# Парсим JSON
+# Парсим JSON — читаем файл прямо в Python через env var (не через pipe `cat | python3`).
-cat "$ISSUES_TMP" | python3 <<'PYEOF'
+# При pipe + sys.exit(0) после print, cat получает SIGPIPE → script exits 141 под
+# set -o pipefail. Передача path через env var не использует pipe → no SIGPIPE.
+ISSUES_FILE="$ISSUES_TMP" python3 <<'PYEOF'
 import json, os, subprocess, sys, datetime
 
 cutoff = int(os.environ.get("CUTOFF", "0"))
@@ -75,7 +77,8 @@ if cutoff == 0:
     sys.exit(1)
 
 # Read pagination output — multiple JSON arrays separated by "---PAGE_END---"
-raw = sys.stdin.read()
+with open(os.environ["ISSUES_FILE"]) as f:
+    raw = f.read()
 pages = [p.strip() for p in raw.split("---PAGE_END---") if p.strip()]
 data = []
 for p in pages: