fix: skip packaging tests when dist/ not built (CI unit-test) #325

Job	Run time
Lint	15s
Secret Scan (gitleaks)	4s
Unit Tests (macOS)	2m 8s
Server DB Integration Tests	45s
Server Unit Tests	29s
Typecheck	28s
Unit Tests (Node 22)	1m 53s
Unit Tests (Node 20)	1m 50s
Web Tests	32s
Repo Provider Integration Tests	0s
Coverage Report	0s
E2E Tests	0s
Docker Build & Push	0s
Publish to npm	0s
	8m 24s

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