fix(core): stop custom metric exporters breaking the metrics export (… #3613

Job	Run time
typecheck / typecheck	2m 11s
units / packages / 🧪 Unit Tests: Packages (1, 3)	3m 0s
units / e2e-webapp / 🧪 E2E Tests: Webapp	6m 31s
units / packages / 🧪 Unit Tests: Packages (2, 3)	3m 6s
units / packages / 🧪 Unit Tests: Packages (3, 3)	4m 14s
units / internal / 🧪 Unit Tests: Internal	7m 20s
units / webapp / 🧪 Unit Tests: Webapp (5, 12)	6m 52s
units / webapp / 🧪 Unit Tests: Webapp (1, 12)	9m 0s
units / webapp / 🧪 Unit Tests: Webapp (3, 12)	9m 45s
units / webapp / 🧪 Unit Tests: Webapp (2, 12)	7m 9s
units / webapp / 🧪 Unit Tests: Webapp (4, 12)	7m 18s
units / webapp / 🧪 Unit Tests: Webapp (6, 12)	6m 40s
units / webapp / 🧪 Unit Tests: Webapp (12, 12)	6m 49s
units / webapp / 🧪 Unit Tests: Webapp (8, 12)	6m 55s
units / webapp / 🧪 Unit Tests: Webapp (9, 12)	7m 37s
units / webapp / 🧪 Unit Tests: Webapp (11, 12)	7m 29s
units / webapp / 🧪 Unit Tests: Webapp (10, 12)	7m 13s
units / webapp / 🧪 Unit Tests: Webapp (7, 12)	7m 6s
publish-worker-v4 / build (supervisor)	2m 29s
publish-webapp / publish	5m 13s
units / packages / 📊 Merge Reports	20s
scan-supervisor / Scan	34s
📣 Dispatch main image	6s
scan-webapp / Scan	48s
units / webapp / 📊 Merge Reports	24s
	2h 6m 9s

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