Feature: Add `export_ppl_to_yaml` / `export_ppl_to_json` utility

[Rudra-clrscr]

Summary

Currently, all pipeline (PPL) configurations are stored internally in an SQLite database. While this works well for querying and tracking, it makes it difficult for researchers to inspect, version-control, or share a specific pipeline configuration without writing custom query code.

Proposed API

from plf.experiment import export_ppl_to_yaml, export_ppl_to_json
 
# Export a single PPL config to YAML
export_ppl_to_yaml("ppl_data_run_001", output_path="./configs/ppl_data_run_001.yaml")
 
# Export to JSON
export_ppl_to_json("ppl_data_run_001", output_path="./configs/ppl_data_run_001.json")
 
# Optionally, export all active PPLs at once
export_ppl_to_yaml("*", output_dir="./configs/")

Expected output format (YAML example)

pplid: ppl_data_run_001
status: frozen
created_at: "2025-11-02T14:30:00"
workflow:
  loc: my_workflows.GenericDataWorkflow
  args: {}
args:
  data_source:
    loc: my_workflows.MyComputationalComponent
    args:
      initial_value: 42
  algorithm:
    loc: my_workflows.MyComputationalComponent
    args:
      param_b: 5

Acceptance criteria

• export_ppl_to_yaml(pplid, output_path) and export_ppl_to_json(pplid, output_path) functions added to plf.experiment
• Output includes pplid, status, created_at, and the full nested args config
• Raises a clear error if the pplid does not exist
• Unit test added for both export formats
• Functions documented in the README under Experiment Management Tools

[Rudra-clrscr]

@BBEK-Anand Can i be assigned this issue ? I would love work on it as Ssoc'26 contributor

[prasiddhi-105]

@BBEK-Anand Can i be assigned to this issue? I am a SSOC-S5'26 Contributor

[ChaudhariPiyush15]

Hi @maintainers,

I would like to work on this feature as an SSoC'26 contributor.

My approach will be to:

• Add export_ppl_to_yaml() and export_ppl_to_json() utilities under plf.experiment.
• Retrieve the complete pipeline configuration from the SQLite database, including pplid, status, created_at, workflow details, and nested argument configurations.
• Generate clean and structured YAML and JSON exports suitable for sharing and version control.
• Implement clear error handling for invalid or non-existent pplid values.
• Add unit tests covering both export formats and error scenarios.
• Update the README documentation with usage examples and export workflow instructions.

This feature will improve reproducibility, portability, and collaboration by making pipeline configurations easier to inspect and share.

Could you please assign this issue to me?

Thank you!