Remove support for filtering runs by a single contact

[rowanseymour]

No description provided.

[Copilot]

Pull Request Overview

This PR removes support for filtering flow runs by a single contact parameter from the temba_client v2 API. The change simplifies the get_runs method by removing the contact filtering capability.

• Removed contact parameter from the get_runs method signature and documentation
• Updated the internal parameter building to exclude the contact filter
• Updated corresponding test cases to remove contact parameter usage

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
temba_client/v2/init.py	Removed contact parameter from get_runs method signature, docstring, and parameter building
temba_client/v2/tests.py	Updated test case to remove contact parameter from get_runs call and expected parameters

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.79%. Comparing base (d46e053) to head (c296340).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #111   +/-   ##
=======================================
  Coverage   99.79%   99.79%           
=======================================
  Files           9        9           
  Lines        1433     1433           
=======================================
  Hits         1430     1430           
  Misses          3        3           

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