Configure cargo-deny licensing and bump to v0.5.2

[RAprogramm]

Summary

• add a workspace deny.toml that allows MIT/Apache/Unicode licenses and fetches advisories via the git CLI
• declare SPDX licenses for the internal crates and pin the masterror-template path dependency version
• bump the crate to v0.5.2 with README and changelog updates and refresh Cargo.lock

Testing

• cargo +nightly fmt --
• cargo +1.90.0 build --all-targets
• cargo +1.90.0 clippy --all-targets --all-features -- -D warnings
• 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_68ccc6ba1818832b8c91dff803f0dcfb