chore(cc): bump @webex/contact-center to 3.12.0-next.14

[bhabalan]

COMPLETES # https://jira-eng-sjc12.cisco.com/jira/browse/CAI-7507

This pull request addresses

Hold/resume functionality breaking after any recording pause/resume cycle. The SDK's hold() method was reading mediaResourceId from a top-level task data field that gets wiped by recording event reconciliation, causing subsequent hold requests to send an empty mediaResourceId to the backend.

by making the following changes

• Bumped @webex/contact-center from 3.11.0-next.20 to 3.12.0-next.14 in packages/contact-center/store/package.json
• SDK fix (fix(contact-center): read mediaResourceId from interaction.media in hold() to match resume() webex-js-sdk#4848): hold() now reads mediaResourceId from interaction.media[mainInteractionId] — consistent with how resume() already reads it

Change Type

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Tooling change
• Internal code refactor

The following scenarios were tested

• The testing is done with the amplify link
• Manual E2E: hold/resume works correctly after recording pause/resume cycle (previously broken)
• Manual E2E: hold/resume works correctly on fresh call without recording events
• All 1,219 CC widget unit tests pass
• Video demonstration: https://app.vidcast.io/share/355ef012-b9ce-4b84-b35a-cc0f3cc5e303

The GAI Coding Policy And Copyright Annotation Best Practices

• GAI was not used (or, no additional notation is required)
• Code was generated entirely by GAI
• GAI was used to create a draft that was subsequently customized or modified
• Coder created a draft manually that was non-substantively modified by GAI (e.g., refactoring was performed by GAI on manually written code)
• Tool used for AI assistance (GitHub Copilot / Other - specify)
  • Github Copilot
  • Other - Claude Code
• This PR is related to
  • Feature
  • Defect fix
  • Tech Debt
  • Automation

Checklist before merging

• I have not skipped any automated checks
• All existing and new tests passed
• I have updated the testing document
• I have tested the functionality with amplify link

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