fix(cli): correct Rust CLI license metadata

[ranxi2001]

Description

Align the Rust CLI package metadata with the component's authoritative Apache-2.0 license. crates/LICENSE and the root README already identify crates/ov_cli as Apache-2.0, while its Cargo manifest incorrectly declared MIT.

Human Involvement

• A human participated in the implementation or review loop
• This PR was generated entirely by AI agents without human participation in the loop

Related Issue

Fixes #3689

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test update

Changes Made

• Change the ov_cli package license expression from MIT to Apache-2.0.
• Keep the existing Apache-2.0 license text and README license table unchanged.

Testing

• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have tested this on the following platforms:
  • Linux
  • macOS
  • Windows

Validation performed:

• Parsed crates/ov_cli/Cargo.toml with Python tomllib and asserted package.license == "Apache-2.0".
• Confirmed crates/LICENSE contains Apache License 2.0 and the README already documents crates/ov_cli as Apache 2.0.
• Confirmed the diff contains only crates/ov_cli/Cargo.toml and passes git diff --check.

Checklist

• My code follows the project's coding style
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas (not applicable: no code changed)
• I have made corresponding changes to the documentation (not applicable: existing documentation is already correct)
• My changes generate no new warnings (Cargo validation was not available locally)
• Any dependent changes have been merged and published (not applicable: no dependencies)

Screenshots (if applicable)

Not applicable.

Additional Notes

cargo metadata and Rust tests were not run locally because Cargo is unavailable in the current environment. This is a metadata-only, one-line SPDX correction with no runtime behavior change.