fix: enforce WIP limit on card creation (#517) #658

Job	Run time
Workflow Lint	34s
Dependency Review	8s
OpenAPI Guardrail / OpenAPI Guardrail	1m 1s
Dependency Security Signals	-1s
Backend Solution Regression	-1s
Demo Director Smoke	-1s
Load and Concurrency Harness	0s
E2E Smoke	0s
	1m 40s

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