feat(executor): add query execution stats

[dqhl76]

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Summary

feat(executor): add query execution stats

root@localhost:8000/default/default> from system.query_execution;

from
  system.query_execution

╭────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│          node          │          timestamp         │               query_id               │ process_rows │ process_time_in_micros │
│         String         │          Timestamp         │                String                │    UInt64    │         UInt64         │
├────────────────────────┼────────────────────────────┼──────────────────────────────────────┼──────────────┼────────────────────────┤
│ vU7wCmWh9Zo1Vq2iGZbyN1 │ 2025-07-15 07:42:32.000000 │ bc8ddfc1-75c1-458d-8104-d4cd97b6bc69 │            2 │                    766 │
│ vU7wCmWh9Zo1Vq2iGZbyN1 │ 2025-07-15 07:42:38.000000 │ 77e2ad37-ae73-4a1d-a2b0-4cfdce4cceec │      9791888 │                 383508 │
│ vU7wCmWh9Zo1Vq2iGZbyN1 │ 2025-07-15 07:42:39.000000 │ 77e2ad37-ae73-4a1d-a2b0-4cfdce4cceec │    291175190 │                9891921 │
│ vU7wCmWh9Zo1Vq2iGZbyN1 │ 2025-07-15 07:42:40.000000 │ 79909746-d352-477a-8891-cc12a88d520e │            8 │                    448 │
│ vU7wCmWh9Zo1Vq2iGZbyN1 │ 2025-07-15 07:42:40.000000 │ 77e2ad37-ae73-4a1d-a2b0-4cfdce4cceec │    290045495 │                9887434 │
│ vU7wCmWh9Zo1Vq2iGZbyN1 │ 2025-07-15 07:42:41.000000 │ 77e2ad37-ae73-4a1d-a2b0-4cfdce4cceec │    291243909 │                9888362 │
╰────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

---

This change is 

[github-actions]

Docker Image for PR

• tag: pr-18345-e6916cc-1752477930

note: this image tag is only available for internal use.

[github-actions]

ClickBench Report

• hits: https://benchmark.databend.com/clickbench/pr/18345/16259954239/hits.html
• internal: https://benchmark.databend.com/clickbench/pr/18345/16259954239/internal.html
• load: https://benchmark.databend.com/clickbench/pr/18345/16259954239/load.html
• tpch: https://benchmark.databend.com/clickbench/pr/18345/16259954239/tpch.html

[dqhl76]

Note: This commit includes a minor fix unrelated to the PR's title.

Problem: Tasks were being incorrectly pushed to the current_tasks queue here. It could cause a single task cost two points to be executed.

Solution: This change removes the redundant push to current_tasks, ensuring each task is cost one point. (Only occurred at steal_task_to_context)

[dqhl76]

Remove a flaky test: This test need wait for acquiring all semaphares. It can correct acquire finally but the time is not sure.

[wubx]

Why not add it to system.processes?

[dqhl76]

Why not add it to system.processes?

The key difference is that system.processes shows a real-time snapshot of what's currently running, whereas system.query_execution displays performance metrics from the last 10 seconds. A finish query will also have a record.
Another reason is that in a distributed environment, system.processes only shows one record for a given query. The new table is designed to show a record for each node involved, giving a much more detailed, per-node view.
To not break the current system.processes, I choose to create a new table.