chore: bump version to 0.21.1

[Copilot]

Summary

Bumps the monorepo version from 0.21.0 to 0.21.1 across all packages.

Type of Change

• Build/CI improvements

Changes Made

• Updated version field to 0.21.1 in package.json, client/package.json, server/package.json, and cli/package.json
• Updated workspace dependency references in root package.json to ^0.21.1
• Regenerated package-lock.json via npm install

All changes applied via npm run update-version 0.21.1 and verified with npm run check-version.

Related Issues

Testing

• Tested in UI mode
• Tested in CLI mode
• Tested with STDIO transport
• Tested with SSE transport
• Tested with Streamable HTTP transport
• Added/updated automated tests
• Manual testing performed

Test Results and/or Instructions

npm run check-version passes — all 4 packages at 0.21.1, workspace deps and lock file in sync.

Checklist

• Code follows the style guidelines (ran npm run prettier-fix)
• Self-review completed
• Code is commented where necessary
• Documentation updated (README, comments, etc.)

Breaking Changes

None.

Additional Context

None.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Bump version to 0.21.1</issue_title>
<issue_description>- Bump version to 0.21.1

• Use the npm script to verify that versions have been updated correctly</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Bump version to 0.21.1 #1115

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[cliffhall]

LGTM! 👍