test(milvus): cast exposed_port to str for substring assert

[Tranquility2]

Problem

test_run_milvus_success asserts:

assert url and exposed_port in url

get_exposed_port() returns int, so the in check against a string url raises:

TypeError: 'in <string>' requires string as left operand, not int

CI evidence: test (3.10|3.13|3.14, milvus) jobs fail this assertion for both v2.4.0 and v2.4.4.

Fix

Cast exposed_port to str before the substring check.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.12%. Comparing base (be4c857) to head (a7df3d7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1035      +/-   ##
==========================================
- Coverage   83.29%   83.12%   -0.18%     
==========================================
  Files          16       16              
  Lines        1754     1754              
  Branches      193      193              
==========================================
- Hits         1461     1458       -3     
- Misses        236      240       +4     
+ Partials       57       56       -1     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.