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## Description Adds a PostgreSQL tool kind `postgres-list-active-queries` that returns the top N currently running queries (`state='active'`) from `pg_stat_activity`, ordered by longest running first. Each row includes: `pid`, `user`, `database`, `application_name`, `client_addr`, `state`, `wait_event_type`, `wait_event`, `backend_start`, `xact_start`, `query_start`, computed `duration`, and `query` (SQL text). Parameters supported - `min_duration` (optional) — only include queries running at least this long (e.g., "1 minute", "2 seconds"). - `exclude_application_names`(optional) — comma-separated list of application_name values to exclude (e.g., "psql,pgAdmin 4,my-batch"). - `limit` (optional) — max rows to return (default 50). **Test Output** - Test without filter: <img width="1439" height="894" alt="image" src="https://github.com/user-attachments/assets/92009211-4f71-4830-a689-4fd2f0558477" /> - Test with filter, but response <img width="1451" height="893" alt="image" src="https://github.com/user-attachments/assets/903a0fc4-ad3e-4e9f-aacd-0b6349addc94" /> - Test with filter, but no response <img width="1411" height="896" alt="image" src="https://github.com/user-attachments/assets/a4d74883-11cc-402f-abcf-cd998e247209" /> --- > Should include a concise description of the changes (bug or feature), it's > impact, along with a summary of the solution ## PR Checklist --- > Thank you for opening a Pull Request! Before submitting your PR, there are a > few things you can do to make sure it goes smoothly: - [x] Make sure you reviewed [CONTRIBUTING.md](https://github.com/googleapis/genai-toolbox/blob/main/CONTRIBUTING.md) - [x] Make sure to open an issue as a [bug/issue](https://github.com/googleapis/genai-toolbox/issues/new/choose) before writing your code! That way we can discuss the change, evaluate designs, and agree on the general idea - [x] Ensure the tests and linter pass - [x] Code coverage does not decrease (if any source code was changed) - [x] Appropriate docs were updated (if necessary) - [x] Make sure to add `!` if this involve a breaking change Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com>