Remove nil values from data object in create methods.

[abhijitjavelin]

`{

"regex": null, // removes this

}`

[gemini-code-assist]

Summary of Changes

Hello @abhijitjavelin, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request primarily focuses on improving the data serialization process for API requests by preventing None values from being sent in data objects. Concurrently, it updates the project's development dependencies and build commands to migrate from ruff and mypy to flake8 for code linting, simplifying the local development setup.

Highlights

• Data Serialization Refinement: Modified various create and update methods across several service files (gateway_service.py, provider_service.py, route_service.py, secret_service.py, template_service.py) to use exclude_none=True when converting Pydantic models to dictionaries for API requests. This ensures that fields with None values are not included in the outgoing request payloads, leading to cleaner and potentially more robust API interactions.
• Development Tooling Update: The project's Makefile and pyproject.toml have been updated to replace ruff and mypy with flake8 for code linting. This change streamlines the development environment's quality checks by consolidating linting under a single tool.

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[gemini-code-assist]

Code Review

This pull request implements the removal of null values from API request payloads by using exclude_none=True when serializing Pydantic models. The changes are consistently applied to create and update methods across all relevant services. Additionally, the pull request includes changes to the project's development tooling, specifically the removal of the ruff linter.