Disable Jupyter history manager to suppress Almond

Add jupyter_server_config.py to disable the history manager, which prevents
history_request messages that cause JSON decoding errors in Almond 0.9.1:

  ERROR Kernel Ignoring error decoding message
  java.lang.Exception: Error decoding message:
  com.github.plokhotnyuk.jsoniter_scala.core.JsonReaderException

The error is cosmetic (doesn't break functionality) but annoying in logs.
Disabling history requests eliminates the error completely while maintaining
all Chisel functionality and visualization capabilities.

Author: jserv

Dockerfile

@@ -31,6 +31,7 @@ ENV JUPITER_DATA_DIR=/jupyter/data
 
 RUN mkdir -p $JUPYTER_CONFIG_DIR/custom
 RUN cp source/custom.js $JUPYTER_CONFIG_DIR/custom/
+RUN cp source/jupyter_server_config.py $JUPYTER_CONFIG_DIR/
 
 # Second stage - download Scala requirements and the Scala kernel
 FROM base as intermediate-builder

source/jupyter_server_config.py

@@ -0,0 +1,13 @@
+# Jupyter Server Configuration
+# This configuration disables history requests to prevent Almond kernel
+# JSON decoding errors that are harmless but annoying
+
+c = get_config()  #noqa
+
+# Disable history access to prevent history_request messages
+# that cause JSON decoding errors in Almond 0.9.1
+c.HistoryManager.enabled = False
+c.HistoryManager.hist_file = ':memory:'
+
+# Optional: Reduce logging noise
+c.Application.log_level = 'WARN'