chore(backend): add pytest.ini configuration

[bturcotte520]

Add standard pytest configuration file with:

• Test discovery in tests/ directory
• Standard naming conventions (test_.py, Test, test_*)
• Verbose output with short tracebacks
• Deprecation warning filters for cleaner output

Pull Request Title

Related Issue

Description

copilot:summary

Type

• Bug Fix
• Feature Enhancement
• Documentation Update
• Code Refactoring
• Other (please specify):

Proposed Changes

Screenshots / Code Snippets (if applicable)

How to Test

Checklist

• The code compiles successfully without any errors or warnings
• The changes have been tested and verified
• The documentation has been updated (if applicable)
• The changes follow the project's coding guidelines and best practices
• The commit messages are descriptive and follow the project's guidelines
• All tests (if applicable) pass successfully
• This pull request has been linked to the related issue (if applicable)

Additional Information

copilot:walkthrough

---

Summary by cubic

Adds a pytest.ini to the backend to standardize test discovery and clean up test output.
It discovers tests in tests/, uses test_.py/Test/test_*, runs with -v and short tracebacks, and filters Deprecation/PendingDeprecation warnings.

^{Written for commit d262172. Summary will update on new commits.}

[cubic-dev-ai]

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