feat: Add correlation extraction label

[e-fisher]

Description

Add correlation label to indicate which request was the source of value extraction.

How to Test

• Verify first match / most recent match toggle is respected
• Verify it works as expected with both default and custom replacer

Checklist

• I have performed a self-review of my code.
• I have added tests for my changes.
• I have run linter locally (npm run lint) and all checks pass.
• I have run tests locally (npm test) and all tests pass.
• I have commented on my code, particularly in hard-to-understand areas.

Screenshots (if appropriate):

Related PR(s)/Issue(s)

[cristianoventura]

Looks and works great! 🚀