Updating directory structure and process script

[smarthg-gi]

No description provided.

[gemini-code-assist]

Code Review

This pull request introduces manifest files for private school demographics and statistics imports and refactors the processing script to support conditional execution via command-line flags. Feedback focuses on including a missing MCF file in the statistics manifest, optimizing the flag-based execution logic to avoid redundant processing, and improving error logging by preserving stack traces.

[smarthg-gi]

@gemini-code-assist

[gemini-code-assist]

The refactoring to support separate imports for stats and place data using CLI flags is well-implemented. I noticed one minor improvement: in scripts/us_nces/demographics/private_school/private_school_stats/manifest.json, the curator_emails list is currently empty ([""]). Please ensure this is populated with the appropriate contact email for the dataset.