feat(webapp,run-engine): mollifier drainer replay + stale sweep + cancelled-run engine API #6569

Job	Run time
Detect changes	3s
e2e-webapp / 🧪 E2E Tests: Webapp	3m 51s
typecheck / typecheck	7m 38s
packages	0s
webapp / 🧪 Unit Tests: Webapp (3, 8)	3m 34s
internal / 🧪 Unit Tests: Internal (8, 8)	5m 8s
webapp / 🧪 Unit Tests: Webapp (5, 8)	5m 6s
internal / 🧪 Unit Tests: Internal (1, 8)	6m 43s
webapp / 🧪 Unit Tests: Webapp (2, 8)	4m 9s
internal / 🧪 Unit Tests: Internal (4, 8)	6m 0s
webapp / 🧪 Unit Tests: Webapp (6, 8)	7m 47s
webapp / 🧪 Unit Tests: Webapp (1, 8)	6m 31s
internal / 🧪 Unit Tests: Internal (3, 8)	9m 16s
webapp / 🧪 Unit Tests: Webapp (7, 8)	8m 41s
internal / 🧪 Unit Tests: Internal (6, 8)	5m 9s
webapp / 🧪 Unit Tests: Webapp (4, 8)	8m 32s
internal / 🧪 Unit Tests: Internal (2, 8)	12m 50s
webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 44s
internal / 🧪 Unit Tests: Internal (7, 8)	6m 8s
internal / 🧪 Unit Tests: Internal (5, 8)	8m 47s
sdk-compat	-1s
e2e	-1s
webapp / 📊 Merge Reports	46s
internal / 📊 Merge Reports	24s
All PR Checks	3s
	1h 59m 48s

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