Refactor Format Schema

[fi5421]

Description

This PR implements the refactoring described in Refactor format_schema Method in utility_functions.py.

Summary of Changes

• The format_schema function has been refactored and moved to a separate module.

• The new flow is as follows:

  1. format_schema loads all table and column descriptions from CSV files into a description_dict.

  2. A schema_config_dict is constructed. This dictionary holds all schema-specific information, including:

     • Tables
     • Column names
     • Primary keys and foreign keys
     • Descriptions
     • Column examples
     • Column types

  3. The schema_config_dict is passed to each schema format function independently to generate the final schema output.

Key Notes

• Decouples DB Access from Schema Format Logic:
  Even schema formats that don’t require DB access (e.g., Text) still receive a fully populated schema_config_dict. Which can inadvertently lead to slow execution however this design promotes clear separation of concerns and paves the way for supporting multiple database connectors in the future.

• Removes External Dependencies:
  Eliminates reliance on external packages like SQLAlchemy, reducing overhead and simplifying the dependency tree.

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Dependent PRs

This PR depends on updates made to utility_functions.py in the following PR:
Update Utility Functions

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For Reviewers

Please review utility_functions.py only after Update Utility Functions is merged to avoid unrelated diffs.

:)