test(DescriptionSection): add massive scaling tests for #4350

[REHAN-503]

Description

Fixes #4350

This PR adds comprehensive massive scaling tests for the DescriptionSection component to verify its behavior under extreme bounds and high-volume user interactions.

Problem Context

The component needs to handle massive data sets including long descriptions (up to 280 chars), rapid user input, and extreme edge cases that could cause buffer overflows or layout distortions.

Solution Implemented

Added DescriptionSection.massive_scaling.test.tsx with 5 focused test cases:

Test	Scenario	Validation
1	Maximum character limit	Renders correctly at 280 chars with counter at zero
2	Oversized input clamping	Clamps 500 chars down to 280, no negative counter
3	Warning threshold	Amber color activates at 241+ chars (40 remaining)
4	Performance under load	generateReadme handles 1,000 calls efficiently
5	DOM stability	Survives 500 rapid re-renders without breaking

Test Results

✓ DescriptionSection – Massive Data Sets (5 tests) 478ms
  ✓ Case 1: 280-char limit with counter validation
  ✓ Case 2: Oversized input clamping (500 → 280 chars)
  ✓ Case 3: Amber warning threshold (40 chars remaining)
  ✓ Case 4: generateReadme with 1,000 calls
  ✓ Case 5: DOM stability after 500 re-renders

Test Files  1 passed (1)
Tests       5 passed (5)

[Aamod-Dev]

Thanks for the contribution. I went through the changes and the overall approach looks good.

[github-actions]

🎉 Congratulations @REHAN-503! Your PR has been successfully merged. 🚀

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