chore(deps): update anyio requirement from >=4.4.0 to >=4.15.1

[dependabot]

Updates the requirements on anyio to permit the latest version.

Release notes

Sourced from anyio's releases.

4.15.1

• Implemented a compatibility fix for supporting direct access of anyio.* submodules from the main package even when those submodules were not directly imported first (#1311 <agronholm/anyio#1311)

Commits

• ffcd154 Bumped up the version
• 0ecf5ed Added a workaround for third party code accessing unimported submodules (#1309)
• 9283662 Bumped up the version
• d137692 Improved the instructions for AI agents
• 033fc52 Shield TemporaryDirectory cleanup from cancellation (#1304)
• 942e9a6 [pre-commit.ci] pre-commit autoupdate (#1305)
• b825c3b Fixed pyproject.toml changes not triggering the test suite
• 9727dc5 Fixed start inconsistencies between trio and asyncio (#1198)
• b05fe6d Fixed wrong type in move_on_after (#1297)
• 44d0c93 Fixed asyncio task group coroutine cleanup (#1275)
• Additional commits viewable in compare view

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 37%. Comparing base (6d8caeb) to head (8de340b).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #527   +/-   ##
=====================================
  Coverage     37%     37%           
=====================================
  Files        820     820           
  Lines      40936   40936           
  Branches    9010    9010           
=====================================
  Hits       15404   15404           
  Misses     23462   23462           
  Partials    2070    2070           

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