Fix delegate lookup in Container::has

[samdark]

Summary

• make Container::has() respect configured delegate containers
• avoid the no-delegate miss-path overhead by guarding delegate lookup with a hasDelegates flag
• add regression coverage for delegate-only entries

Fixes #401.

Tests

• vendor/bin/phpunit --testdox
• vendor/bin/phpbench run tests/Benchmark/ContainerMethodHasBench.php --report=default --group=has

Benchmark note

With xdebug on and opcache off, the guarded fix keeps the no-delegate nonexistent lookup path at baseline: about 401 us for 200 nonexistent IDs versus about 405 us before the change. The unguarded variant measured about 463 us.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (59579ea) to head (642a4a1).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##              master      #402   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
- Complexity       184       188    +4     
===========================================
  Files             11        11           
  Lines            500       509    +9     
===========================================
+ Hits             500       509    +9     

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[Copilot]

Pull request overview

This PR fixes Yiisoft\Di\Container::has() so it respects configured delegate containers (PSR-11 behavior), and adds regression coverage for “delegate-only” entries while avoiding extra overhead when no delegates are configured.

Changes:

• Update Container::has() to consult delegates (guarded by a new hasDelegates flag).
• Track whether any delegates are configured during setDelegates().
• Add a unit test ensuring has() and get() work for entries provided only by a delegate container.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/Container.php	Makes has() consult delegate containers and adds a flag to avoid delegate lookup overhead when none are configured.
tests/Unit/ContainerTest.php	Adds regression test for delegate-provided entries being discoverable via has().

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

[vjik]

Add line to changelog

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