docs: align suite framing with cross-CLI INTEROP (template-vault-cli v0.4.8)

[DrBaher]

Summary

Aligns the README's suite-header framing with the cross-CLI interop contract published in template-vault-cli's docs/INTEROP.md and the corresponding sibling-issue (§5 sign-cli) in docs/SIBLING-ISSUES.md. template-vault-cli v0.4.8 is now shipped, so the framing it specifies is no longer forthcoming.

• Adds template-vault-cli as the storage layer feeding the pre-execution pipeline
• Adds draft-cli at the start of the chain (previously missing — sign-cli's README started at nda-review-cli)
• Adds compare-cli as the cross-version drift detector (sibling, not in the linear chain)
• Replaces ""three-CLI contract suite"" → ""contract-operations CLI suite""

Change

One line — the suite-header blockquote at the top of README.md.

Before:

Part of the three-CLI contract suite. nda-review-cli (draft, review, negotiate) → docx2pdf-cli (DOCX → PDF) → sign-cli (signing + audit). Showcase site.

After:

Part of the contract-operations CLI suite. template-vault-cli (storage) feeds the pipeline: draft-cli (fill placeholders) → nda-review-cli (review, redline, negotiate) → docx2pdf-cli (DOCX → PDF) → sign-cli (signing + audit). Drift detection via compare-cli. Showcase site.

Divergence from the SIBLING-ISSUES §5 sketch

§5's example uses bare [name]-style placeholders. I instead matched the INTEROP.md authoritative example shape (linked-bold names + short parenthetical descriptors) because that preserves this README's existing voice — the current header already uses [**name-cli**](url) + short parens for every tool. Functionally identical, stylistically aligned with what's already on the page.

Out of scope (per the issue)

• No version bump, CHANGELOG entry, or tag — this is a docs nudge, not a release
• No new flags (--why, -V, etc.) — those conventions are target-state for a separate PR
• No new dev tooling

Test plan

• npm run lint:legal-claims — clean (31 files scanned)
• npm run typecheck — clean
• npm test — 766 / 767 pass, 1 skipped, 0 failures (~14s)

Push only — please review and merge.

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