Prep 4.19 Release

[sleepyStick]

PYTHON-XXXX

Changes in this PR

Test Plan

Checklist

Checklist for Author

• Did you update the changelog (if necessary)?
• Is there test coverage?
• Is any followup work tracked in a JIRA ticket? If so, add link(s).

Checklist for Reviewer

• Does the title of the PR reference a JIRA Ticket?
• Do you fully understand the implementation? (Would you be comfortable explaining how this code works to someone else?)
• Is all relevant documentation (README or docstring) updated?

[Copilot]

🟢 Approval recommended

Both metadata updates are consistent with release preparation, with no unresolved issues.

0 open findings

What changed in this PR

Prepares PyMongo 4.19.0 for release by finalizing its version and changelog date.

Changes:

• Removes the development suffix from version 4.19.0.
• Sets the release date to October 14, 2026.

File	Description
pymongo/​_version.py	Sets the stable release version.
doc/​changelog.rst	Records the release date.

🧠 Review effort: Balanced

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[blink1073]

LGTM!