Add owned ErrorResponse mapping and bump 0.10.7

[RAprogramm]

Summary

• add an owning From<AppError> conversion for ErrorResponse to reuse payload metadata without cloning
• switch the Axum adapter to the consuming conversion and cover owned mappings in tests
• bump the crate to v0.10.7 and document the change in the changelog/README

Testing

• cargo +nightly fmt --
• cargo +1.90.0 clippy -- -D warnings
• cargo +1.90.0 build --all-targets
• cargo +1.90.0 test --all
• cargo +1.90.0 doc --no-deps
• cargo deny check
• cargo audit

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https://chatgpt.com/codex/tasks/task_e_68cf378f8018832bbc359c3770de595c