Fix jsonschema reinstall logic in start.sh

Reinstall jsonschema after devdata restore to fix circular import issues.

start.sh

@@ -760,14 +760,6 @@ RUNTIME_JUPYTER_ENABLED="$DEV_MODE_ENABLED"
 # Add user bin to PATH for jupyter-lab (installed in Dockerfile when DEV_MODE=true)
 export PATH="$HOME/.local/bin:$PATH"
 
-# Fix: reinstall jsonschema if it is broken (circular import caused by partial install)
-if [ "$DEV_MODE_ENABLED" = "true" ]; then
-  if ! python3 -c "import jsonschema" >/dev/null 2>&1; then
-    echo "jsonschema import failed — reinstalling..."
-    python3 -m pip install --force-reinstall --no-cache-dir --break-system-packages "jsonschema>=4.0" >/dev/null 2>&1 || true
-  fi
-fi
-
 # Runtime install fallback: only attempt if DEV_MODE is enabled but install failed during build
 if [ "$DEV_MODE_ENABLED" = "true" ] && ! python3 -c "import jupyterlab" >/dev/null 2>&1; then
   echo "DEV_MODE enabled but jupyter-lab is missing; attempting runtime install..."
@@ -930,6 +922,17 @@ if [ "$RUNTIME_JUPYTER_ENABLED" = "true" ] && \
     echo "DevData  : restore warning (non-fatal); continuing startup."
 fi
 
+# Fix: reinstall jsonschema AFTER devdata restore — restore can overwrite a broken
+# version from .local/lib/python3.11/site-packages into the workspace, causing
+# JupyterLab to crash with a circular import error on every boot.
+if [ "$DEV_MODE_ENABLED" = "true" ]; then
+  if ! python3 -c "import jsonschema" >/dev/null 2>&1; then
+    echo "DevData  : jsonschema broken after restore — reinstalling (circular import fix)..."
+    python3 -m pip install --force-reinstall --no-cache-dir --break-system-packages "jsonschema>=4.0" >/dev/null 2>&1 || true
+    echo "DevData  : jsonschema reinstall done."
+  fi
+fi
+
 # 10.5. Start JupyterLab Terminal on internal port 8888 (DEV_MODE only)
 # Accessible via /terminal/ path through the health-server proxy
 if [ "$RUNTIME_JUPYTER_ENABLED" = "true" ]; then