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test(context): use http.StatusContinue constant instead of magic number 100

test(context): use http.StatusContinue constant instead of magic number 100: a task in repo2rlenv-pr-diff (Harbor dataset). Title: test(context): use http.StatusContinue constant instead of magic number 100

The task

**Title:** test(context): use http.StatusContinue constant instead of magic number 100

Part of FineEnvs/repo2rlenv-pr-diff.