Add Apache 2.0 licensing metadata

[Octane0411]

Problem statement

The repository did not declare a project license in a standard way. It was missing a root LICENSE file, had no package.json license field, and did not carry notice text for the upstream Apache-licensed project it references.

Scope summary

• add an Apache 2.0 LICENSE file at the repository root
• add a root NOTICE file with upstream attribution context
• declare Apache-2.0 in package.json
• document the repository license in README.md

References

• Upstream license: /Users/wangruobing/Personal/symwork/original-symphony/LICENSE
• Upstream notice: /Users/wangruobing/Personal/symwork/original-symphony/NOTICE
• Apache License 2.0: https://www.apache.org/licenses/LICENSE-2.0

Validation

• pnpm lint