fix: add untrusted data wrapper to the export resource MCP-197

[nirinchev]

Proposed changes

Checklist

• I have signed the MongoDB CLA

[Copilot]

Pull Request Overview

This PR adds an untrusted data wrapper to the export resource functionality. The changes modify how exported data is presented by wrapping the actual data content with untrusted data markers and providing a document count summary.

• Adds untrusted data wrapping to exported MongoDB data content
• Tracks the number of documents transformed during export
• Updates test to verify the new wrapped format and extract data for validation

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
tests/integration/resources/exportedData.test.ts	Updates test to verify untrusted data wrapper format and extract content for validation
src/resources/common/exportedData.ts	Implements untrusted data formatting with document count in export resource
src/common/exportsManager.ts	Adds document counting functionality and returns both content and count from exports

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[himanshusinghs]

Looks good 💯 Just need to check the test failures.

[coveralls]

Pull Request Test Coverage Report for Build 17671857423

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 44 of 46 (95.65%) changed or added relevant lines in 2 files are covered.
• 31 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.06%) to 81.466%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/common/exportsManager.ts	38	40	95.0%

Files with Coverage Reduction	New Missed Lines	%
src/common/connectionManager.ts	6	87.86%
src/tools/atlas/connect/connectCluster.ts	10	77.22%
src/common/config.ts	15	89.98%

Totals
Change from base Build 17650490388:	-0.06%
Covered Lines:	4866
Relevant Lines:	5876

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💛 - Coveralls