dispatch: updates to secretary

Signed-off-by: vsoch <vsoch@users.noreply.github.com>

Author: vsoch

README.md

@@ -277,7 +277,11 @@ mcpserver start --config examples/jobspec/mcpserver.yaml --join http://0.0.0.0:8
 If you are doing experiments, you can bring up a hub the same way:
 
 ```bash
+# Start as a standalone hub (recommended)
 mcpserver start --hub --hub-secret potato
+
+# Start in dual mode (not recommended for production or performance experiments
+mcpserver start --dual --hub-secret potato
 ```
 
 To mock (simulate) a worker, add `--mock`, optionally with a particular archetype (one of `hpc`, `cloud`, or `standalone`). A worker ID is suggested to make the seed reproducible.

mcpserver/core/hub.py

@@ -82,7 +82,7 @@ def set_running_mode(self, batch_size=None, serial=False, dual=False):
         self.batch_size = batch_size
         self.semaphore = asyncio.Semaphore(batch_size)
         self.run_on_fleet = self.run_on_fleet_batched
-        logger.info(f"🚦 Hub initialized with Batch Size: {batch_size}")
+        logger.info(f"🚦 Hub initialized with Batch Size: {batch_size} Worker mode: {dual}")
 
         # If we are also running as a worker, add ourselves to the fleet
         self.dual = dual