Meter the strips past the sixteenth node on the larger models

[baakhoff]

The metering block we read (GET_MEM on entity 0x3c, offset 0) carries sixteen nodes, which covers every strip on the iD24: two mics, ten digital inputs, four DAW returns. The iD44 shows twenty strips and the iD48 twenty-four, so their last strips can never light. Since 9e5d010 they draw a dark ladder instead of writing past the state arrays — but that is a guard, not metering.

GET_MEM takes an offset, so the larger devices may expose more nodes in further blocks, or one larger block. Needs a capture on real hardware, same territory as #8.

• read blocks past offset 0 on an iD44/iD48 and see what moves
• size the meter state to the device instead of a fixed sixteen