MLE-24230 First batch of package updates

[rjrudin]

• Removed deepcopy, using native Node structuredClone.
• Moved eslint to devDependencies (which removes 50+ dependencies total from the real dependency graph!).
• Upgraded busboy and documented why we're using it instead of dicer (going to use CONTRIBUTING for providing any explanations for things in package.json).
• Removing usage of caret in package.json to avoid accidentally picking up malicious upgrades.

[github-actions]

Copyright Validation Results
Total: 7 | Passed: 3 | Failed: 0 | Skipped: 4 | at: 2025-10-15 17:22:34 UTC | commit: 9f26c8b

⏭️ Skipped (Excluded) Files

• CONTRIBUTING.md
• Jenkinsfile
• package-lock.json
• package.json

✅ Valid Files

• NOTICE.txt
• lib/query-builder.js
• lib/values-builder.js

✅ All files have valid copyright headers!

[Copilot]

Pull Request Overview

This PR modernizes dependency management by removing unnecessary packages, reorganizing dependencies, and eliminating version ranges to prevent unintended upgrades.

Key Changes:

• Replaced deepcopy package with native structuredClone API
• Moved eslint from dependencies to devDependencies
• Removed caret (^) version prefixes and updated package versions

Reviewed Changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
package.json	Removed deepcopy and eslint from dependencies, updated package versions without carets, moved eslint to devDependencies
lib/values-builder.js	Replaced deepcopy() with native structuredClone()
lib/query-builder.js	Replaced deepcopy() with native structuredClone()
NOTICE.txt	Removed license entries for deepcopy and eslint, fixed BOM character issue
CONTRIBUTING.md	Added documentation explaining the use of @fastify/busboy over dicer

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