[Bug] ZMQ write() does not prepend simtime, breaking mixed ZMQ/file-based studies

[GaneshPatil7517]

hey @pradeeban Sir
When write() sends data over ZMQ, it sends val directly:

ZMQ path (line ~244)

zmq_p.send_json_with_retry(val) # Sends raw val — no simtime prefix

But when writing to file, it prepends simtime:

File path (line ~315)

data_to_write = [simtime + delta] + _to_native(val) # Prepends simtime

Meanwhile, read() always expects inval[0] to be simtime:

simtime = max(simtime, current_simtime_from_file) # Assumes inval[0] is simtime
return inval[1:] # Returns everything after simtime

Impact: A study with a ZMQ writer → file reader (or vice versa) will:

• Interpret the first data value as simtime (data corruption)
• Return one fewer data element than expected
• Silently produce wrong results

This makes mixed ZMQ/file topologies fundamentally broken.

[GaneshPatil7517]

hey @pradeeban sir ill happy to create a PR on this...