Actions data feed returns all action labels

This changelog entry was added retrospectively.

The Actions data feed (GET /feed/actions) endpoint now returns every label assigned to an action. Previously, only the first label was included when an action had more than one.

Developer impact: The action_label field can now contain multiple entries, joined by |, each formatted as a JSON object (for example, {"label_id":"..."|"label_name":"..."}). Special characters in label names are now properly escaped. If your integration assumed action_label would only ever contain a single entry, update your parsing to handle multiple pipe-separated entries.

Action required: If you parse action_label, update your integration to handle multiple pipe-separated label entries instead of assuming exactly one.