[Executor] Gen flow meta for eager flow

[lumoslnt]

Description

This pull request primarily adds function that generating flow meta for eager flow. the flow meta is similar to tool meta, including entry, function name, inputs, outputs and source. The function will be called by SDK and save the metadata to flow.json. Expected flow meta:

{
    "function": "my_flow",
    "entry": "flow_with_trace:my_flow",
    "inputs": {
        "text": {
            "type": "string"
        },
        "models": {
            "type": "list"
        }
    },
    "outputs": {
        "output": {
            "type": "string"
        }
    },
    "source": "flow_with_trace.py"
}

The most important changes are:

New Functionality:

• src/promptflow/promptflow/_core/tool_meta_generator.py: Added a new function collect_flow_entry_in_module(m, entry) to collect flow entries from a module. This function inspects the module members and returns the function corresponding to the provided entry.
• src/promptflow/promptflow/_core/tool_meta_generator.py: Introduced another function generate_flow_meta_dict_by_file(path: str, entry: str, source: str = None). This function generates a dictionary containing metadata about a eager flow, including its entry, function name, inputs, outputs, and source if provided.

Unit Tests:

• src/promptflow/tests/executor/unittests/_utils/test_generate_tool_meta_utils.py: Added a new function cd_and_run_generate_flow_meta(working_dir, source_path, entry, source=None) to test the generation of flow metadata.
• src/promptflow/tests/executor/unittests/_utils/test_generate_tool_meta_utils.py: Included a new test case test_generate_flow_meta(self, flow_dir, entry_path, entry) to validate the functionality of the generate_flow_meta_dict_by_file function.

Test Configurations:

• src/promptflow/tests/test_configs/eager_flows/dummy_flow_with_trace/flow_with_trace.meta.json: Added a new JSON file to the test configurations. This file contains metadata for the my_flow function from the flow_with_trace.py file.

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]

SDK CLI Global Config Test Result devs/linatang/gen_tool_meta_for_eager_flow

2 tests   2 ✅  43s ⏱️
1 suites  0 💤
1 files    0 ❌

Results for commit 0f62a41.

♻️ This comment has been updated with latest results.

[github-actions]

Executor Unit Test Result devs/linatang/gen_tool_meta_for_eager_flow

734 tests   734 ✅  46s ⏱️
  1 suites    0 💤
  1 files      0 ❌

Results for commit 0f62a41.

♻️ This comment has been updated with latest results.

[github-actions]

promptflow SDK CLI Azure E2E Test Result devs/linatang/gen_tool_meta_for_eager_flow

  4 files    4 suites   3m 23s ⏱️
148 tests 127 ✅ 21 💤 0 ❌
592 runs  508 ✅ 84 💤 0 ❌

Results for commit 0f62a41.

♻️ This comment has been updated with latest results.

[github-actions]

Executor E2E Test Result devs/linatang/gen_tool_meta_for_eager_flow

197 tests   195 ✅  4m 13s ⏱️
  1 suites    2 💤
  1 files      0 ❌

Results for commit 0f62a41.

♻️ This comment has been updated with latest results.

[github-actions]

SDK CLI Test Result devs/linatang/gen_tool_meta_for_eager_flow

   12 files     12 suites   41m 23s ⏱️
  422 tests   406 ✅ 16 💤 0 ❌
1 688 runs  1 624 ✅ 64 💤 0 ❌

Results for commit 0f62a41.

♻️ This comment has been updated with latest results.