Add --cert support to uv pip - #20418
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## Summary Add pip-compatible `--cert <path>` support to all `uv pip` commands. The option is scoped to the `uv pip` namespace, so other uv commands continue to reject it. An explicit certificate bundle replaces uv's default, system, and `SSL_CERT_FILE` / `SSL_CERT_DIR` trust sources for that invocation, matching pip's behavior without modifying the environment inherited by child processes.
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## Summary Add pip-compatible `--cert <path>` support to all `uv pip` commands. The option is scoped to the `uv pip` namespace, so other uv commands continue to reject it. An explicit certificate bundle replaces uv's default, system, and `SSL_CERT_FILE` / `SSL_CERT_DIR` trust sources for that invocation, matching pip's behavior without modifying the environment inherited by child processes. Preserve newer release-branch TLS alert regression tests and update the restored certificate snapshots to the current output format.
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Summary
Add pip-compatible
--cert <path>support to alluv pipcommands. The option is scoped to theuv pipnamespace, so other uv commands continue to reject it.An explicit certificate bundle replaces uv's default, system, and
SSL_CERT_FILE/SSL_CERT_DIRtrust sources for that invocation, matching pip's behavior without modifying the environment inherited by child processes.