refactor: Bump mongodb from 6.15.0 to 6.16.0

[dependabot]

Bumps mongodb from 6.15.0 to 6.16.0.

Release notes

Sourced from mongodb's releases.

v6.16.0

6.16.0 (2025-04-21)

The MongoDB Node.js team is pleased to announce version 6.16.0 of the mongodb package!

Release Notes

distinct commands now support an index hint

The Collection.distinct() method now supports an optional hint, which can be used to tell the server which index to use for the command:

// providing an index description
await collection.distinct('my-key', { 
  hint: { 'my-key': 1 }
});
// providing an index name
await collection.distinct('my-key', {
hint: 'my-key'
});

This requires server 7.1+.

Driver support for servers <=4.0 deprecated

[!WARNING] Node driver support for server 4.0 will be removed in an upcoming minor release. Reference: MongoDB Software Lifecycle Schedules.

Fix processing of multiple messages within one network data chunk

During elections, or other scenarios where the server is pushing multiple topology updates to the driver in a short period of time, a bug in the driver's socket code led to backlog of topology updates that would remain in the buffer until another heartbeat arrived from the server. This could lead to delays in the driver recovering from an election and/or an increase in MongoServerSelectionErrors.

Now, all messages in the current buffer are returned to the driver leading to faster processing times.

Huge thank you to @​andreim-brd for sharing a self-contained reproduction that proved to be instrumental in the identification of the underlying issue!

FindCursor.rewind() throws documents?.clear() is not a function errors in certain scenarios

In certain scenarios where limit and batchSize are both set on a FindCursor, an internal driver optimization intended to prevent unnecessary requests to the server when the driver knows the cursor is exhausted would prevent the cursor from being rewound. This issue has been resolved.

Features

• NODE-6494: add support for hint on distinct commands (#4487) (40d0e87)
• NODE-6515: deprecate driver support for server 4.0 (#4517) (4c1a8a7)

Bug Fixes

... (truncated)

Changelog

Sourced from mongodb's changelog.

6.16.0 (2025-04-21)

Features

• NODE-6494: add support for hint on distinct commands (#4487) (40d0e87)
• NODE-6515: deprecate driver support for server 4.0 (#4517) (4c1a8a7)

Bug Fixes

• NODE-6630: read all messages in buffer when chunk arrives (#4512) (8c86e30)
• NODE-6878: documents.clear() throws a TypeError after cursor is rewound (#4488) (a1fffeb)

Commits

• b648a63 chore(main): release 6.16.0 [skip-ci] (#4489)
• 4c1a8a7 feat(NODE-6515): deprecate driver support for server 4.0 (#4517)
• efffb50 chore: use return await syntax in UTR to jump to throwing operation (#4514)
• 0d7f464 chore: add logging to flaky tests (#4513)
• a1fffeb fix(NODE-6878): documents.clear() throws a TypeError after cursor is rewound ...
• 8c86e30 fix(NODE-6630): read all messages in buffer when chunk arrives (#4512)
• f0b8739 test(NODE-6891): add coverage for all test runs (#4508)
• c5bed5e test(NODE-6495): add drivers-evergreen-tools a submodule (#4509)
• 4f03359 test(NODE-6862): unskip flaky csot spec test (#4504)
• 4ac4f9d test(NODE-6863): unskip flaky csot legacy timeout spec test (#4505)
• Additional commits viewable in compare view

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