Fix Alexandria terms acceptance version flag

[developersdigest]

The terms acceptance command used --version, which the root CLI consumed as its own version flag, exiting successfully without submitting a request. Rename it to --terms-version and keep the API payload field as version. Update the error guidance, README, and focused tests.

Validation: TypeScript build and 26 focused tests pass. Ran the actual built CLI against a local mock HTTP server: missing --confirm exits 1 without a request; explicit confirmation sends exactly one POST with the expected provider, version, digest, and confirmed fields and exits 0. No live terms acceptance performed.

The separate live terms catalog 403 remains a backend access issue; this PR fixes the CLI flag collision.

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Summary by cubic

Fixes the alexandria terms accept command's --version flag colliding with the root CLI's version flag, which made the command exit successfully without submitting a request. The flag is renamed to --terms-version; the API payload field remains version.

Notes

• Updated error guidance, README, and focused tests to use --terms-version.
• No live terms acceptance performed; the separate live terms catalog 403 remains a backend access issue.

^{Written for commit c2774e4. Summary will update on new commits.}