mongo-cxx-driver r4.5.3

C++ Driver for MongoDB

Release notes

## Fixed

- Use exact match for file ID in GridFS methods CVE-2026-88034

See the [full list of changes in Jira](https://jira.mongodb.org/issues/?jql=project%20%3D%20CXX%20AND%20fixVersion%20%3D%204.5.3).

## Feedback
To report a bug or request a feature, please open a ticket in the MongoDB issue management tool Jira:

- [Create an account](https://jira.mongodb.org) and login.
- Navigate to the [CXX project](https://jira.mongodb.org/browse/CXX)
- Click `Create`.

## Signature Verification
Release artifacts may be verified by using the accompanying detached signature (.asc) and the cpp-driver public key obtained from https://pgp.mongodb.com.

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