Loom Does Not Indicate When the JSON is Full

[prototypicalpro]

Describe the bug
Loom uses a StaticJsonDocument for its internal JSON storage. Because of this, the amount of data that Loom can process during a single measurement cycle is limited. Though this limit is quite high, Loom provides no indication that the maximum has been reached-- meaning data above this limit is silently discarded (as is the default behavior of a StaticJsonDocument). To prevent confusion, Loom should provide some notice that the user has reached the maximum allowable data size.