chore: update dependencies and remove unused imports

[yashin4112]

• Updated @contentstack/json-rte-serializer from ^3.0.5 to ^3.1.0
• Updated axios from ^1.15.2 to ^1.16.0 in both ui and upload-api
• Updated react-router and react-router-dom to ^7.15.0
• Removed unused import of AutoMappedMergeConfirmModal in Migration/index.tsx
• Updated package-lock.json to reflect changes in axios and other dependencies

🔗 Jira Ticket

Replace with your ticket link — required before requesting review.

MIGRATION-XXXX

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📋 PR Type

• ✨ Feature
• 🐛 Bug Fix
• 🔥 Hotfix
• ♻️ Refactor
• 🧹 Chore / Dependency Update
• 📝 Documentation

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📝 Description

What changed?

Why?

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🧩 Affected Areas

• api — Node.js backend
• ui — React frontend
• upload-api — Upload API server
• docker / docker-compose
• CI / GitHub Actions workflows
• Environment variables / config
• Other:

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🧪 How to Test

Expected result:

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📸 Screenshots / Recordings

Before	After

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🔗 Related PRs / Dependencies

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✅ Author Checklist

Complete this before moving the PR out of Draft.

• Branch follows naming convention: feature/, bugfix/, or hotfix/ + 5–30 lowercase chars
• Jira ticket linked above
• Self-reviewed the diff — no debug logs, commented-out code, or TODOs left in
• .env / example.env updated if new environment variables were added
• No sensitive credentials or secrets committed
• Existing tests pass locally (npm test)
• New tests written (or not applicable — explain why)
• README.md / docs updated if behaviour changed
• Talisman pre-push scan passes (no secrets flagged)

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👀 Reviewer Notes

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Migration v2 · Docs · Issues

[github-actions]

🔒 Security Scan Results

ℹ️ Note: Only vulnerabilities with available fixes (upgrades or patches) are counted toward thresholds.

Check Type	Count (with fixes)	Without fixes	Threshold	Result
🔴 Critical Severity	0	0	10	✅ Passed
🟠 High Severity	12	334	25	✅ Passed
🟡 Medium Severity	11	3	500	✅ Passed
🔵 Low Severity	0	0	1000	✅ Passed

⏱️ SLA Breach Summary

⚠️ Warning: The following vulnerabilities have exceeded their SLA thresholds (days since publication).

Severity	Breaches (with fixes)	Breaches (no fixes)	SLA Threshold (with/no fixes)	Status
🔴 Critical	0	0	15 / 30 days	✅ Passed
🟠 High	0	0	30 / 120 days	✅ Passed
🟡 Medium	0	2	90 / 365 days	⚠️ Warning
🔵 Low	0	0	180 / 365 days	✅ Passed

ℹ️ Vulnerabilities Without Available Fixes (Informational Only)

The following vulnerabilities were detected but do not have fixes available (no upgrade or patch). These are excluded from failure thresholds:

• Critical without fixes: 0
• High without fixes: 334
• Medium without fixes: 3
• Low without fixes: 0

⚠️ BUILD PASSED WITH WARNINGS - SLA breaches detected for issues without available fixes

Consider reviewing these vulnerabilities when fixes become available.

[umeshmore45]

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