Add default catalog setting for DJ nodes

[shangyian]

Summary

In some cases, DJ nodes are created (in draft mode) that don't have any valid upstream nodes, thus making it so that we can't infer an appropriate catalog for the node. We seem to default to catalog_id = 0 for these invalid nodes, which causes issues since this catalog is never updated after the node becomes valid. This PR adds a default catalog for nodes that don't have an inferrable catalog at creation time.

Test Plan

Locally

• [x] PR has an associated issue: #1166
• [x] make check passes
• [x] make test shows 100% unit test coverage

Deployment Plan

ASAP

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