feat(webapp,run-engine): mollifier drainer replay + stale sweep + cancelled-run engine API #6696

Job	Run time
Detect changes	5s
packages / 🧪 Unit Tests: Packages (1, 1)	11m 52s
typecheck / typecheck	7m 33s
e2e-webapp / 🧪 E2E Tests: Webapp	3m 32s
internal / 🧪 Unit Tests: Internal (1, 8)	6m 52s
internal / 🧪 Unit Tests: Internal (3, 8)	9m 3s
webapp / 🧪 Unit Tests: Webapp (1, 8)	6m 29s
internal / 🧪 Unit Tests: Internal (2, 8)	14m 41s
webapp / 🧪 Unit Tests: Webapp (2, 8)	5m 1s
webapp / 🧪 Unit Tests: Webapp (4, 8)	8m 22s
webapp / 🧪 Unit Tests: Webapp (5, 8)	5m 52s
internal / 🧪 Unit Tests: Internal (4, 8)	5m 41s
internal / 🧪 Unit Tests: Internal (7, 8)	6m 12s
webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 48s
webapp / 🧪 Unit Tests: Webapp (6, 8)	8m 8s
webapp / 🧪 Unit Tests: Webapp (7, 8)	8m 46s
internal / 🧪 Unit Tests: Internal (6, 8)	5m 26s
webapp / 🧪 Unit Tests: Webapp (3, 8)	3m 31s
internal / 🧪 Unit Tests: Internal (5, 8)	7m 34s
internal / 🧪 Unit Tests: Internal (8, 8)	6m 29s
sdk-compat	0s
e2e	0s
webapp / 📊 Merge Reports	47s
packages / 📊 Merge Reports	23s
internal / 📊 Merge Reports	30s
All PR Checks	3s
	2h 15m 40s

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