feat: restore CI/release, prompt contracts, faster install (0.9.33)

Bring back Gitea CI + auto-publish; share release helpers; strengthen multi-turn
tool/job prompts with a unit contract; ccache/make help and --release bootstrap.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/ci_publish.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+# CI helper: publish release assets with RELEASE_TOKEN falling back to
+# GITHUB_TOKEN. Skips cleanly when neither is set.
+#   scripts/ci_publish.sh FILE...
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+export GITEA_TOKEN="${RELEASE_TOKEN:-${GITEA_TOKEN:-${GITHUB_TOKEN:-}}}"
+if [[ -z "${GITEA_TOKEN}" ]]; then
+  echo "::warning::no RELEASE_TOKEN / GITHUB_TOKEN; skip auto-release"
+  exit 0
+fi
+[[ $# -gt 0 ]] || { echo "usage: $0 FILE..." >&2; exit 1; }
+export CI="${CI:-true}"
+exec bash "$ROOT/scripts/release.sh" "$@"