* docs: add pull_request_target/workflow_run guidance and base-action trust model
Adds a security.md section on safe checkout patterns under
pull_request_target/workflow_run, and a trust-model section to the
base-action README clarifying that callers are responsible for the
working directory and prompt being trusted.
🏠 Remote-Dev: homespace
* docs: refine PRT/workflow_run guidance — root checkout + workflow_run ref
Second example now checks out the base ref at the workspace root before
the head-ref subdirectory checkout (this action expects a git repo at
the root). Adds the workflow_run ref form, drops the PRT-specific
gh-pr-diff hint from the first example, and generalises the closing
line to cover both event types.
🏠 Remote-Dev: homespace
* docs: use actions/checkout@v6 in examples (consistency)
🏠 Remote-Dev: homespace