Updated database schema to v2 and updated tests acordingly

[AtomicAlexD]

Pull Request Type:

1. Title: [Database v2 upgrade]
2. Description:

• Summary: Updated the database to a v2 which should handle transactions and added tests.
• Motivation: We planned out the DB better and delt with some issues like how we assign values to budgets.
• Proposed Solution: Describe your solution in detail. Explain how you implemented the change. Be specific.
• Screenshots/GIFs (if applicable): If your change involves UI changes, include screenshots or a GIF to demonstrate the impact.
• Testing: Ran the UV tests after updating them and also managed to successfully add a new user.

3. Checklist:

[x] I have followed the project's coding style and conventions.
[x] I have written unit tests to cover my changes.
[x] My code has been tested locally.
[x] I have included screenshots/GIFs if applicable.
[x] I have updated the documentation (if necessary).
[x] I have labeled this PR appropriately (e.g., "bug," "feature," "refactor").

4. Reviewer Notes (Optional - Add if you have specific requests)

[Copilot]

Pull Request Overview

This PR updates the database schema to version 2 by replacing the budget-related functionalities with user-related ones and updating corresponding tests and UI logic.

• Renames SQL queries, test functions, and data handler methods from budget to user.
• Updates the home page to work with user data instead of budgets.
• Revises the database schema YAML to add a new user table and modify foreign key relationships accordingly.

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.

File	Description
src/tests/test_data_handler.py	Updated test functions and SQL queries to reference the user table.
src/front/home.py	Modified UI endpoints and flash messages to use user names.
src/data_handler.py	Renamed and adjusted database functions to handle users.
src/config_files/verity_schema.yaml	Updated schema definitions to include the user table and adjust foreign keys.

Files not reviewed (1)

• src/front/templates/home.html: Language not supported

Comments suppressed due to low confidence (2)

src/front/home.py:33

• [nitpick] Consider correcting the capitalization in the flash message to 'User name not saved, please check the logs' for consistency.

flash("user Name not saved, please check the logs", "error")

src/config_files/verity_schema.yaml:15

• [nitpick] Ensure consistency in table naming conventions; if other tables use plural names, consider renaming 'account_type' to 'account_types' or updating others for uniformity.

- table_name: account_type

[Jake-Pullen]

sweet, Thanks