chore: dual-license under MIT OR Apache-2.0

[MauroToscano]

Adopt the standard Rust dual-license layout:

• Rename LICENSE to LICENSE-MIT
• Add LICENSE-APACHE (Apache-2.0)
• Set license = "MIT OR Apache-2.0" via [workspace.package] and inherit in every workspace crate
• Add License + Contribution sections to README

[github-actions]

Codex Code Review

No issues found in the PR diff.

The changes are limited to licensing metadata/docs: adding workspace license = "MIT OR Apache-2.0", applying license.workspace = true to workspace crates, renaming LICENSE to LICENSE-MIT, and adding LICENSE-APACHE.

Validation:

• git diff --check passed.
• I attempted cargo metadata --no-deps, but the environment could not create a rustup temp file under /home/runner/.rustup/tmp due to a read-only filesystem, so manifest parsing was not independently verified here.

[claude]

Review: chore/dual-license

Clean, well-structured PR. All 7 workspace crates correctly inherit license = "MIT OR Apache-2.0" from [workspace.package], using the canonical Rust dual-license setup.

No functional issues found. A couple of things worth confirming before merge:

Legal hygiene: If any external contributors have ever submitted code under the original MIT-only terms, they should explicitly agree to the relicensing before this merges. Apache 2.0 adds a patent grant (additive, not restrictive), but it's still a license change on their contribution. From the visible commit history this appears to be an internal team repo, so this is likely a non-issue.

Copyright year: Both license files use Copyright 2025 Yet Another Company. Perfectly fine if 2025 is the project inception year; if you want to reflect ongoing development, 2025-2026 is also conventional.

Everything else looks correct:

• SPDX expression "MIT OR Apache-2.0" is correct Cargo syntax
• license.workspace = true is the correct inheritance form, applied consistently to all 7 crates
• LICENSE-APACHE is the unmodified canonical Apache 2.0 text
• README license and contribution sections follow the standard Rust project template (e.g., rustc, tokio)