[Draft] Implement experimental events api

[thy09]

Description

Please add an informative description that covers that changes made by the pull request and link all relevant issues.

All Promptflow Contribution checklist:

• The pull request does not introduce [breaking changes].
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.
• Create an issue and link to the pull request to get dedicated review from promptflow team. Learn more: suggested workflow.

General Guidelines and Best Practices

• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

• Pull request includes test coverage for the included changes.

[github-actions]

promptflow-tracing test result

 12 files   12 suites   7m 33s ⏱️
 19 tests  19 ✅ 0 💤 0 ❌
228 runs  228 ✅ 0 💤 0 ❌

Results for commit c0c220d.

♻️ This comment has been updated with latest results.

[github-actions]

promptflow SDK CLI Azure E2E Test Result heta/experimental-events-api

  2 files    2 suites   2m 5s ⏱️
238 tests 203 ✅ 35 💤 0 ❌
476 runs  406 ✅ 70 💤 0 ❌

Results for commit c0c220d.

♻️ This comment has been updated with latest results.

[github-actions]

SDK CLI Test Result heta/experimental-events-api

    2 files      2 suites   6h 8m 15s ⏱️
  664 tests   646 ✅ 13 💤 5 ❌
1 328 runs  1 295 ✅ 26 💤 7 ❌

For more details on these failures, see this check.

Results for commit c0c220d.

♻️ This comment has been updated with latest results.

[github-actions]

SDK CLI Global Config Test Result heta/experimental-events-api

0 tests   0 ✅  0s ⏱️
0 suites  0 💤
0 files    0 ❌

Results for commit c0c220d.

♻️ This comment has been updated with latest results.

[github-actions]

promptflow-core test result

0 tests   0 ✅  0s ⏱️
0 suites  0 💤
0 files    0 ❌

Results for commit c0c220d.

♻️ This comment has been updated with latest results.

[github-actions]

Executor E2E Test Result heta/experimental-events-api

0 tests   0 ✅  0s ⏱️
0 suites  0 💤
0 files    0 ❌

Results for commit c0c220d.

♻️ This comment has been updated with latest results.

[github-actions]

Executor Unit Test Result heta/experimental-events-api

0 tests   0 ✅  0s ⏱️
0 suites  0 💤
0 files    0 ❌

Results for commit c0c220d.

♻️ This comment has been updated with latest results.

[github-actions]

Hi, thank you for your interest in helping to improve the prompt flow experience and for your contribution. We've noticed that there hasn't been recent engagement on this pull request. If this is still an active work stream, please let us know by pushing some changes or leaving a comment.

[github-actions]

Hi, thank you for your contribution. Since there has not been recent engagement, we are going to close this out. Feel free to reopen if you'd like to continue working on these changes. Please be sure to remove the no-recent-activity label; otherwise, this is likely to be closed again with the next cleanup pass.