docs: align ctx_record tool schema 💚

[kingrubic]

Summary

• include profile in the advertised ctx_record types
• derive title and body limit descriptions from their enforcement constants

Closes #39

Testing

• npm run check (30 files, 298 tests passed)

AI assistance

AI tooling assisted with the implementation; I reviewed and understand the submitted changes.

[kingrubic]

Closing this PR to tidy the backlog after more than 48 hours without maintainer feedback. Please feel free to reopen it if a maintainer finds the contribution useful. Thank you.