[codex] Clarify STRK20 claim boundaries

[odinfree]

Summary

This PR clarifies the STRK20 claim boundaries in the privacy grid after the latest content review.

It removes wording that could imply STRK20 is already formally zero-knowledge or full-stack post-quantum safe today, and replaces it with narrower claim language: S-two/STARK proving is live, formal ZK remains a roadmap item, and the post-quantum score applies to the hash-based STARK proof layer rather than every Starknet dependency.

It also tightens adjacent STRK20 wording around sequencer-level S-two proof verification, encrypted viewing keys registered with an independent third-party auditor, and DeFi composability through existing Starknet liquidity and app surfaces without promising zero custom work for every existing contract.

Changes

• Clarifies the STRK20 formally-ZK partial score and tooltip.
• Replaces broad post-quantum copy with proof-layer-specific language.
• Updates STRK20 proof-verification wording to sequencer-level S-two verification.
• Names encrypted viewing keys in the visible selective-disclosure card.
• Softens DeFi composability wording and adds a sourced STRK20 caveat footnote.
• Bumps the cache-busted data file to data_v29.js.

Verification

• node scripts/validate-data.js
• git diff --check HEAD~1 HEAD
• Targeted phrase scan for removed risky wording.