Remove file target

[samdark]

File target isn't needed for Docker-based setup as well as for ./yii serve.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.96%. Comparing base (0233f44) to head (1326a89).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #443   +/-   ##
=========================================
  Coverage     76.96%   76.96%           
  Complexity       29       29           
=========================================
  Files            11       11           
  Lines           178      178           
=========================================
  Hits            137      137           
  Misses           41       41           

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[Copilot]

Pull request overview

Removes the file-based log target dependency and configuration, relying solely on stream-based logging for Docker and ./yii serve setups.

Changes:

• Replaced FileTarget usage with StreamTarget in the bootstrap temporary error handler (public/index.php).
• Removed FileTarget from DI logger target configuration (config/common/di/logger.php).
• Dropped yiisoft/log-target-file from Composer dependencies (composer.json).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
public/index.php	Switches the temporary container-building logger from file output to stream output.
config/common/di/logger.php	Removes FileTarget from configured logger targets, leaving StreamTarget.
composer.json	Removes the yiisoft/log-target-file package requirement since it’s no longer used.

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