Normalizes a live shadow MQTT payload for param listeners.
/update/documents: returns current (full shadow doc with previous+current
envelope unwrapped so callers see the usual { state, metadata, version } shape).
Other topics: returns the parsed payload as received.
Always returns an object ({} when absent / non-object).
Type Parameters
T extends Record<string,unknown> = Record<string,unknown>
Normalizes a live shadow MQTT payload for param listeners.
/update/documents: returnscurrent(full shadow doc with previous+current envelope unwrapped so callers see the usual{ state, metadata, version }shape).{}when absent / non-object).