Expose internal stack introspection APIs as a statistical runtime analysis tool

Feature or enhancement

Implement a new high-frequency runtime observer that leverages the existing _remote_debugging module to collect detailed execution statistics from running Python processes. This tool enables non-intrusive observation of production applications by attaching to already-running processes without requiring any code modifications, restarts, or special startup flags. The observer can perform extremely high-frequency sampling of stack traces and interpreter state, providing detailed runtime execution analysis of live applications.

Linked PRs

• gh-135998
• gh-136777
• gh-138304
• gh-138715
• gh-138721
• gh-138875
• gh-138880
• gh-139364
• gh-139485
• gh-141666
• gh-141689
• gh-141719
• gh-146045

先閱讀現有的 _remote_debugging 模組，以及 issue 中列出的相關 PRs，因為它們似乎包含目前進行中的實作工作。在估算範圍之前，先確認預期使用哪些堆疊自省 API，以及 observer 的行為；只有當約定的執行期分析工具能夠附加到正在執行的 Python 程序，並在不修改程式碼或重新啟動的情況下收集指定的統計資料時，該 issue 才算完成。