fix(fiber): bound runner memory under sustained Fibre load #2496

Job	Run time
Detect code changes	4s
Determine Image Tag	2s
proto / buf-check	8s
lint / yamllint	11s
lint / golangci-lint	1m 51s
lint / goreleaser-check	12s
test / Run Integration Tests	2m 6s
test / Run Unit Tests	3m 11s
test / Build All ev-node Binaries	2m 3s
test / Go Mod Tidy Check	1m 4s
lint / markdown-lint	29s
lint / hadolint	12s
docker / Build ev-node-testapp	17m 32s
docker / Build ev-node-evm	17m 25s
docker / Build ev-node-grpc	17m 6s
test / Run EVM Execution Tests	1m 53s
test / Run E2E System Tests	11m 44s
test / Combine and Upload Coverage	0s
docker-tests	-1s
	1h 17m 12s

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