ci: use a unique temp dir for the bread-ecosystem clone in dev/beta CI

The fixed /tmp/bread-ecosystem-ci path races when multiple repos' dev/beta
workflows run close together on the same self-hosted runner — one job's
rm -rf/clone can stomp another's in-progress checkout, causing the
regenerate-index step to fail intermittently. Switch to mktemp -d.

.forgejo/workflows/dev-release.yml

@@ -29,7 +29,7 @@ jobs:
         run: |
           set -euo pipefail
           cd src
-          CUR="$(grep -m1 '^version' Cargo.toml | sed -E 's/.*"(.*)".*/\1/')"
+          CUR="$(grep -m1 '^version' breadsearch/Cargo.toml | sed -E 's/.*"(.*)".*/\1/')"
           IFS='.' read -r MA MI PA <<< "${CUR}"
           SHA="$(git rev-parse --short HEAD)"
           TS="$(date -u +%Y%m%d%H%M%S)"
@@ -62,8 +62,10 @@ jobs:
             echo "::error::BAKERY_MINISIGN_SEC_KEY_PATH secret not set — refusing to regenerate dev index.json unsigned (would leave a stale signature mismatched against fresh content and break bakery for everyone on the dev track)"
             exit 1
           fi
-          rm -rf /tmp/bread-ecosystem-ci
-          # --branch dev: the TRACK-aware gen-index.sh isn't merged to
-          # bread-ecosystem's main yet.
-          git clone --branch dev https://git.breadway.dev/Breadway/bread-ecosystem.git /tmp/bread-ecosystem-ci
-          TRACK=dev bash /tmp/bread-ecosystem-ci/scripts/gen-index.sh
+          rm -rf /tmp/bread-ecosystem-ci-* 2>/dev/null || true
+          # mktemp: a fixed clone path races when multiple repos' dev/beta
+          # workflows run close together on the same self-hosted runner.
+          ECOSYSTEM_CI_DIR="$(mktemp -d /tmp/bread-ecosystem-ci-XXXXXX)"
+          git clone --branch dev https://git.breadway.dev/Breadway/bread-ecosystem.git "${ECOSYSTEM_CI_DIR}"
+          TRACK=dev bash "${ECOSYSTEM_CI_DIR}/scripts/gen-index.sh"
+          rm -rf "${ECOSYSTEM_CI_DIR}"