feat(webapp,run-engine): mollifier drainer replay + stale sweep + cancelled-run engine API #6426

Job	Run time
Detect changes	5s
typecheck / typecheck	7m 1s
e2e-webapp / 🧪 E2E Tests: Webapp	3m 34s
internal / 🧪 Unit Tests: Internal (2, 8)	12m 35s
internal / 🧪 Unit Tests: Internal (1, 8)	6m 39s
internal / 🧪 Unit Tests: Internal (7, 8)	6m 23s
webapp / 🧪 Unit Tests: Webapp (4, 8)	3m 45s
webapp / 🧪 Unit Tests: Webapp (6, 8)	3m 45s
internal / 🧪 Unit Tests: Internal (6, 8)	5m 45s
internal / 🧪 Unit Tests: Internal (4, 8)	5m 35s
internal / 🧪 Unit Tests: Internal (5, 8)	7m 19s
webapp / 🧪 Unit Tests: Webapp (7, 8)	3m 46s
webapp / 🧪 Unit Tests: Webapp (3, 8)	3m 45s
webapp / 🧪 Unit Tests: Webapp (8, 8)	3m 47s
internal / 🧪 Unit Tests: Internal (3, 8)	8m 46s
webapp / 🧪 Unit Tests: Webapp (1, 8)	3m 45s
webapp / 🧪 Unit Tests: Webapp (5, 8)	3m 46s
internal / 🧪 Unit Tests: Internal (8, 8)	5m 21s
webapp / 🧪 Unit Tests: Webapp (2, 8)	3m 29s
e2e	0s
packages	0s
sdk-compat	0s
webapp / 📊 Merge Reports	28s
internal / 📊 Merge Reports	24s
All PR Checks	2s
	1h 39m 45s

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