fix: enforce WIP limit on card creation (#517) #678

Job	Run time
Workflow Lint	32s
OpenAPI Guardrail / OpenAPI Guardrail	44s
Dependency Review	6s
Dependency Security Signals	0s
Load and Concurrency Harness	0s
E2E Smoke	0s
Demo Director Smoke	0s
Backend Solution Regression	-1s
	1m 21s

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