Guard node_graph import on remote

[edan-bainglass]

#66 introduced a bug by requiring node_graph on the remote machine to coerce inputs when inputs_spec is defined. Here we make the import best-effort, notifying the user if the dependency is missing with recommendation of how to install it.

[edan-bainglass]

@GeigerJ2 Xing reported the bug this morning. This PR is a bandaid! There is likely a more robust approach to this feature, but I would need to understand the codebase a bit more before doing so.

I propose a coding week in the mountains dedicated to node-graph + aiida-pythonjob + aiida-workgraph. Ideally June 22-26 (if not earlier, but may be tricky), before PASC. Pinging @giovannipizzi 🙂

[GeigerJ2]

@GeigerJ2 Xing reported the bug this morning. This PR is a bandaid! There is likely a more robust approach to this feature, but I would need to understand the codebase a bit more before doing so.

I will have a look, as well. Thanks for the ping!

I propose a coding week in the mountains dedicated to node-graph + aiida-pythonjob + aiida-workgraph. Ideally June 22-26 (if not earlier, but may be tricky), before PASC. Pinging @giovannipizzi 🙂

Yes, totally agree! I've been meaning to really dedicate some meaningful time to this, but never got around to doing so... we should discuss / plan a coding week on it ASAP. WG needs to be out and stable, also, for the tutorial.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.42%. Comparing base (4a4264d) to head (5bfdebd).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #79      +/-   ##
==========================================
- Coverage   89.87%   89.42%   -0.46%     
==========================================
  Files          22       22              
  Lines        1324     1324              
==========================================
- Hits         1190     1184       -6     
- Misses        134      140       +6     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[GeigerJ2]

Just one minor nitpick, to use the parent class ImportError over ModuleNotFoundError.