fix(run-engine,webapp): return unclaimed runs to the queue when pausing #9033

Job	Run time
Detect changes	8s
code-quality / code-quality	2m 19s
runops-guard / runops-guard	1m 47s
e2e-webapp / 🧪 E2E Tests: Webapp	3m 50s
internal / 🧪 Unit Tests: Internal	7m 8s
typecheck / typecheck	3m 35s
webapp / 🧪 Unit Tests: Webapp (8, 12)	7m 17s
webapp / 🧪 Unit Tests: Webapp (11, 12)	7m 4s
webapp / 🧪 Unit Tests: Webapp (4, 12)	7m 28s
webapp / 🧪 Unit Tests: Webapp (2, 12)	6m 42s
webapp / 🧪 Unit Tests: Webapp (1, 12)	6m 47s
webapp / 🧪 Unit Tests: Webapp (5, 12)	7m 4s
webapp / 🧪 Unit Tests: Webapp (3, 12)	7m 18s
webapp / 🧪 Unit Tests: Webapp (10, 12)	7m 16s
webapp / 🧪 Unit Tests: Webapp (12, 12)	7m 20s
webapp / 🧪 Unit Tests: Webapp (9, 12)	7m 19s
webapp / 🧪 Unit Tests: Webapp (7, 12)	7m 10s
webapp / 🧪 Unit Tests: Webapp (6, 12)	6m 50s
packages	0s
sdk-compat	0s
e2e	0s
webapp / 📊 Merge Reports	20s
All PR Checks	6s
	1h 44m 48s

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