cleanup: exclude test suites from coverage metrics (#981)

[arybhatt4533]

This PR addresses the issue of "artificially inflated" coverage numbers by excluding test code and non-production files from the coverage reports.

Changes:
Added .coveragerc to the root directory.
Configured omit patterns to exclude tests/, setup.py, and virtual environments.
This aligns with the "Quality Gate Finalization" phase of my GSoC proposal, ensuring that our 90% coverage target reflects 100% production logic.
@audiodude @rgaudin @legoktm @kelson42 @Jaifroid

[audiodude]

This is incorrect, and looks very much like it was hallucinated by an LLM.

We do not have any */tests/ directories in the project. Did you even look?

[arybhatt4533]

You're right, my apologies. I generalized the omit patterns based on standard Python templates and missed the specific structure of this repository. I should have verified the exact paths before pushing.

I’ll rectify this immediately by mapping the actual test locations and ensuring the .coveragerc reflects the true project layout. I’ll update the PR shortly with the corrected paths. @audiodude