updates sequencerd published messages for fineacquire

[astronomerdave]

These are the updates needed to the sequencerd publishing to support fine acquire. Several legacy UDP async broadcasts have been removed to the GUI will need some changes:

ngps_gui.py — initialize_services()

Add subscriptions for "seq_seqstate" and "seq_broadcast" alongside the existing "seq_waitstate" subscription
Connect a new sequencer_ready_signal (see below) to self.show_popup("NGPS is Ready.")
zmq_status_service.py

Add class-level signal: sequencer_ready_signal = pyqtSignal()
In _status_from_seq_seqstate(), add to state_map: "RUNNING", "STARTING", "STOPPING", "FAILED", "ABORTING". Emit sequencer_ready_signal on the READY transition (guard against re-emit: only fire when previous state was not already "idle")
Add a seq_broadcast branch in listen() and a _handle_seq_broadcast(data) handler that emits new_message_signal with the severity/message/source fields from the payload. This topic carries all narrative operator messages that previously came over UDP async

layout_service.py — status_map in create_system_status_group()

Add color entries for: "running" (green), "starting" (blue), "stopping" (blue), "aborting" (orange), "failed" (red)

[astronomerdave]

Sequencer PUB-SUB visibility migration note:

The intended UI model:
seq_seqstate — lifecycle state (subscribe and display)
seq_waitstate — active wait bits (subscribe and display)
broadcast — operator message window (only these messages, nothing else)

Changes needed in pygui/: @prkrtg

1. ngps_gui.py: subscribe to seq_seqstate (currently missing)
2. ngps_gui.py: subscribe to broadcast (currently missing)
3. zmq_status_service.py / layout_service.py: add FAILED (red) and ABORTING
   (orange/bold) to state_map / status_map
4. Message window must display only broadcast payloads (severity + message);
   raw subsystem topic payloads must not appear there
5. status_service.py UDP "SEQSTATE: READY" popup is now dead code;
   trigger should eventually come from a seq_seqstate ZMQ transition to READY
6. UDP progress messages (PIXELCOUNT_*, EXPTIME) remain in use — do not change

Meanwhile, I've added a utility seqmon that you can run from an xterm, which serves as a proxy for what the GUI should be doing.

[astronomerdave]

two more screen captures:

1) fineacquire running

2) fineacquire locked