test suite takes >60s, investigate and optimize

[rocketman-code]

Test suite currently takes over 60 seconds. This is an anti-pattern that slows down iteration.

Investigate:

• Which tests are slowest? (likely integration tests that build full projects)
• Is seed pre-compilation being shared effectively across tests?
• Are there redundant builds happening across test files?
• Can we parallelize the integration test builds better?

Reduce total wall-clock test time to under 30 seconds ideally.