Aireceipts

Patch: the SPEC-0073 auto-attach hook now fires for the commands coding agents
actually run (fixes #241, PR #252). hook pre-push previously refused any Bash
command with more than one tokenized invocation, and a trailing 2>&1 defeated
even a single plain push — so chained agent pushes (git add && git commit && git push, git push 2>&1 | tail) never attached a receipt ref. The issue's "worktree"
correlation was an agent-command-style correlation. Now: shell redirections are
stripped per invocation, the hook attaches once when at least one invocation is an
unambiguous branch push, any cd/pushd/popd in the command still refuses (the
push may target a different repo than the hook's cwd), and heredoc payloads keep
refusing via an explicit guard. SPEC-0073 R1 amended accordingly.

Also hardened the adopter kit (org-rollout review finding): the hook commands in
docs/adopt/claude-settings.json, docs/adopt/codex-hooks.json, the
docs/pr-receipts.md snippets, and the integrations command's recipes now end
|| true — an npx/registry failure can never block a push.