Introduce reusable composite actions, modular validation groups, and diagnostic utilities #241

Job	Run time
Security Scan	21s
Detect Changes	7s
Frontend Unit Tests	29s
Architecture Tests	2m 1s
Lint Frontend	28s
Kotlin Unit Tests (assistant-api)	1m 48s
Validate Nomad Jobs	22s
Kotlin Unit Tests (auth-api)	1m 49s
Kotlin Integration Tests (assistant-api)	2m 3s
Kotlin Integration Tests (auth-api)	2m 47s
Kotlin Unit Tests (kotlin-common)	1m 7s
Lint Kotlin (auth-api)	53s
Lint Kotlin (kotlin-common)	50s
Lint Kotlin (assistant-api)	52s
System Tests / Build Image (assistant-ui)	32s
System Tests / Build Image (auth-api)	3m 15s
System Tests / Build Image (assistant-api)	3m 7s
System Tests / Build Image (app-ui)	32s
System Tests / Build Image (auth-ui)	38s
Coverage Threshold (auth-api)	3m 0s
Coverage Threshold (kotlin-common)	1m 3s
Coverage Threshold (assistant-api)	2m 9s
System Tests / Nomad Health (app)	6m 26s
System Tests / Nomad Health (platform)	7m 23s
System Tests / Nomad Health (auth)	6m 36s
System Tests / Nomad Health (assistant)	7m 19s
System Tests / System Tests (playwright-2)	3m 56s
System Tests / System Tests (playwright-4)	6m 30s
System Tests / System Tests (api)	3m 35s
System Tests / System Tests (playwright-3)	2m 35s
System Tests / System Tests (playwright-1)	4m 50s
Pipeline Complete	2s
	1h 19m 25s

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