feat(webapp,run-engine): mollifier drainer replay + stale sweep + cancelled-run engine API #6729

Job	Run time
Detect changes	4s
typecheck / typecheck	7m 32s
packages / 🧪 Unit Tests: Packages (1, 1)	11m 42s
e2e-webapp / 🧪 E2E Tests: Webapp	3m 29s
internal / 🧪 Unit Tests: Internal (6, 8)	5m 29s
internal / 🧪 Unit Tests: Internal (5, 8)	7m 39s
internal / 🧪 Unit Tests: Internal (3, 8)	8m 51s
internal / 🧪 Unit Tests: Internal (2, 8)	13m 32s
webapp / 🧪 Unit Tests: Webapp (4, 8)	8m 13s
internal / 🧪 Unit Tests: Internal (1, 8)	7m 32s
internal / 🧪 Unit Tests: Internal (4, 8)	5m 53s
internal / 🧪 Unit Tests: Internal (7, 8)	6m 27s
internal / 🧪 Unit Tests: Internal (8, 8)	5m 12s
webapp / 🧪 Unit Tests: Webapp (7, 8)	9m 6s
webapp / 🧪 Unit Tests: Webapp (5, 8)	5m 43s
webapp / 🧪 Unit Tests: Webapp (2, 8)	4m 48s
webapp / 🧪 Unit Tests: Webapp (6, 8)	8m 30s
webapp / 🧪 Unit Tests: Webapp (3, 8)	4m 9s
webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 56s
webapp / 🧪 Unit Tests: Webapp (1, 8)	6m 34s
e2e	0s
sdk-compat	0s
webapp / 📊 Merge Reports	47s
packages / 📊 Merge Reports	24s
internal / 📊 Merge Reports	24s
All PR Checks	2s
	2h 14m 58s

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