fix(share/peer-manager): fix potential nil dereference in peer manage… #1031

Job	Run time
setup	1s
yamllint	10s
Markdown Lint	9s
hadolint / hadolint	6s
goreleaser	0s
upload-docs	0s
go-ci / Setup	1s
go-ci / Lint	1m 41s
go-ci / Go Mod Tidy Check	26s
go-ci / Lint Imports	21s
go-ci / Unit Tests Coverage (ubuntu-latest)	3m 14s
go-ci / Unit Tests Coverage (macos-14)	5m 16s
go-ci / Integration Tests / Integration Tests Blob	42s
go-ci / Integration Tests / Integration Tests API	1m 29s
go-ci / Integration Tests / Integration Tests Fraud	24s
go-ci / Integration Tests / Da Tests Sync	44s
go-ci / Integration Tests / Integration Tests ND	46s
go-ci / Integration Tests / Integration Tests Pruning	1m 7s
go-ci / Integration Tests / Integration Tests p2p	55s
go-ci / Integration Tests / Integration Tests Reconstruction	22s
go-ci / Integration Tests / Integration Tests Share	37s
go-ci / Integration Tests / Integration Tests Sync	10m 58s
	29m 29s

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