Fix flake in test_postgres_terminate_connection

[fizyk]

Summary by CodeRabbit

• Bug Fixes
  • Improved connection-termination verification for both synchronous and asynchronous tests.
  • Updated the activity checks to restrict results to the active database, avoiding intermittent timeout failures caused by unrelated maintenance connections on some CI environments (e.g., macOS).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: fc472378-ff1b-4ffa-8e93-15861eae4f5b

📥 Commits

Reviewing files that changed from the base of the PR and between 8977dc9 and 2751e65.

📒 Files selected for processing (2)

• newsfragments/+deflake-terminate-connection.misc.rst
• tests/test_postgresql.py

🚧 Files skipped from review as they are similar to previous changes (2)

• newsfragments/+deflake-terminate-connection.misc.rst
• tests/test_postgresql.py

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📝 Walkthrough

Walkthrough

The PostgreSQL termination tests now restrict synchronous and asynchronous activity queries to the current database. A news fragment records the deflake adjustment.

Changes

Terminate connection test scoping

Layer / File(s)	Summary
Scope connection queries to the current database tests/test_postgresql.py, newsfragments/+deflake-terminate-connection.misc.rst	Synchronous and asynchronous pg_stat_activity checks now filter by datname = current_database() alongside the client-backend filter, and the news fragment documents the change.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 6

✅ Passed checks (6 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely matches the main change: deflaking test_postgres_terminate_connection.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Newsfragment Check	✅ Passed	A newsfragment was added at newsfragments/+deflake-terminate-connection.misc.rst, and pyproject.toml shows misc is a valid Towncrier type.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch deflake-test_postgres_terminate_connection

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