[rupayon123]

With RAISE_VALIDATION_ERROR=True, hostname("127.0.0.1") and url("http://10.0.0.1") raise a domain error before their IP alternatives can run. Those inputs already pass with the documented r_ve=True call flag.

Apply the environment setting at the outermost validation call, so nested checks can return false validation errors and try alternatives. Explicit r_ve=True still raises inside nested calls. A context-local scope tracks the outer call’s lifetime, thread and current task; copied contexts cannot suppress later independent calls or calls in another thread/task. The scope is always expired and reset on exit. This keeps the existing synchronous decorator contract.

Regression coverage includes valid/invalid composite inputs, public error metadata, explicit nested flags, copied contexts after returns and exceptions, real worker threads, and normal/eager task inheritance. The full project tox list passes on macOS arm64: Ruff lint/format, strict Pyright, Bandit, 1,599 tests plus one feature-availability skip on Python 3.11.15, and all 1,600 tests on Python 3.12.15, 3.13.14 and 3.14.6. The project lockfile is unchanged. Other operating systems and release-only documentation/manpage exports were not run.