chore: import upstream snapshot with attribution

docs/en/integrations/postgres/tools/postgres-list-active-queries.md

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+---
+title: "postgres-list-active-queries"
+type: docs
+weight: 1
+description: >
+  The "postgres-list-active-queries" tool lists currently active queries in a Postgres database.
+---
+
+## About
+
+The `postgres-list-active-queries` tool retrieves information about currently
+active queries in a Postgres database.
+
+`postgres-list-active-queries` lists detailed information as JSON for currently
+active queries. The tool takes the following input parameters:
+
+- `min_duraton` (optional): Only show queries running at least this long (e.g.,
+  '1 minute', '1 second', '2 seconds'). Default: '1 minute'.
+- `exclude_application_names` (optional): A comma-separated list of application
+  names to exclude from the query results. This is useful for filtering out
+  queries from specific applications (e.g., 'psql', 'pgAdmin', 'DBeaver'). The
+  match is case-sensitive. Whitespace around commas and names is automatically
+  handled. If this parameter is omitted, no applications are excluded.
+- `limit` (optional): The maximum number of rows to return. Default: `50`.
+
+## Compatible Sources
+
+{{< compatible-sources others="integrations/alloydb, integrations/cloud-sql-pg">}}
+
+## Example
+
+```yaml
+kind: tool
+name: list_active_queries
+type: postgres-list-active-queries
+source: postgres-source
+description: List the top N (default 50) currently running queries (state='active') from pg_stat_activity, ordered by longest-running first. Returns pid, user, database, application_name, client_addr, state, wait_event_type/wait_event, backend/xact/query start times, computed query_duration, and the SQL text.
+```
+
+The response is a json array with the following elements:
+
+```json
+{
+  "pid": "process id",
+  "user": "database user name",
+  "datname": "database name",
+  "application_name": "connecting application name",
+  "client_addr": "connecting client ip address",
+  "state": "connection state",
+  "wait_event_type": "connection wait event type",
+  "wait_event": "connection wait event",
+  "backend_start": "connection start time",
+  "xact_start": "transaction start time",
+  "query_start": "query start time",
+  "query_duration": "query duration",
+  "query": "query text"
+}
+```
+
+## Reference
+
+| **field**   | **type** | **required** | **description**                                    |
+|-------------|:--------:|:------------:|----------------------------------------------------|
+| type        |  string  |     true     | Must be "postgres-list-active-queries".            |
+| source      |  string  |     true     | Name of the source the SQL should execute on.      |
+| description |  string  |     true     | Description of the tool that is passed to the LLM. |