[antonrh]

Python 3.10 reaches end of life in October 2026 and 3.15.0 has been released, so the supported range moves to >=3.11, <3.16.

• requires-python, classifiers and ruff target-version updated
• CI matrix drops 3.10 and adds 3.15; lint, floors, benchmarks, coverage and release jobs run on 3.11
• Self, NotRequired and ParamSpec now come from typing instead of typing_extensions
• README and docs say Python 3.11+
• uv.lock regenerated

Tested locally on 3.11, 3.13 and 3.15 (rc1), plus lowest-direct dependencies on 3.11.

[codspeed]

Merging this PR will not alter performance

ℹ️ 17 benchmarks have no flame graph

The flamegraph could not be generated because we failed to resolve the symbols in the profiling trace. This happens when we fail to harvest information about language frames.

• test_benchmark_inject_transient_async
• test_benchmark_transient_scope_async
• test_benchmark_inject_singleton_async
• test_benchmark_global_ref_singleton
• test_benchmark_singleton_scope
• test_benchmark_inject_singleton
• test_benchmark_ref_singleton
• test_benchmark_ref_singleton_without_cache
• test_benchmark_inject_transient
• test_benchmark_transient_scope
• …and 7 more

✅ 17 untouched benchmarks

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_{Comparing python-3.11-3.15 (221e2f1) with main (e825ecb)}