fix(server): update server url when the port change

[mdevolde]

fix(server): update server url when the port change

Why the pull request was made

Because actually, when the server port change, we don't change the server url, and the healthcheck test to ensure that the server is alive will fail.

Summary of changes

• Update LanguageTool._url when we need to change the starting port.

Screenshots (if appropriate):

Not applicable.

Applied local tests.

Resources

Not applicable.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (changes to documentation only)
• Refactor / code style update (non-breaking change that improves code structure or readability)
• Tests / CI improvement (adding or updating tests or CI configuration only)
• Chore / maintenance (non-breaking change that does not affect functionality, such as updating dependencies or fixing typos)
• Other (please describe):

Checklist

• Followed the project's contributing guidelines.
• Updated any relevant tests.
• Updated any relevant documentation.
• Added comments to your code where necessary.
• Formatted your code, run the linters, checked types and tests.
• Added your changes to the CHANGELOG file, if applicable.

[Copilot]

Pull request overview

Fixes a local-server retry bug in language_tool_python where, after switching to a different port due to a startup failure, the client continued sending requests to the original (now incorrect) server URL.

Changes:

• Update LanguageTool._url whenever _start_server_on_free_port() switches to a new port after a ServerError.
• Document the fix in CHANGELOG.md under Unreleased → Fixed.

Reviewed changes

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

File	Description
src/language_tool_python/server.py	Keeps _url in sync with _port when retrying local server startup on a new port.
CHANGELOG.md	Adds an Unreleased “Fixed” entry describing the corrected port/URL mismatch behavior.

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[codecov-commenter]

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Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 80.65%. Comparing base (f3d5fc1) to head (34d8701).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
src/language_tool_python/server.py	0.00%	1 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #210      +/-   ##
==========================================
- Coverage   80.70%   80.65%   -0.05%     
==========================================
  Files          13       13              
  Lines        1767     1768       +1     
==========================================
  Hits         1426     1426              
- Misses        341      342       +1     

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