Include the complete Apache-2.0 license text

## Problem

The repository's `LICENSE` file contains only the short Apache-2.0 source-file header, not the license's full terms and conditions.

At current `main@2de83cb43b759c7b3d07c749c6a3efccd4528007`, the file is 13 lines / 596 bytes and ends after the standard warranty disclaimer. Sections 1–9 and the appendix from the Apache License, Version 2.0 are absent.

GitHub consequently reports this repository's license metadata as `Other / NOASSERTION`, even though the README states that the project is Apache-2.0 licensed.

## Reproduction

1. Open `LICENSE` on the current default branch.
2. Compare it with the canonical Apache-2.0 text at https://www.apache.org/licenses/LICENSE-2.0.txt.
3. Query `repos/bytedance/TableVerse/license` or inspect the repository license metadata.

## Expected behavior

A file named `LICENSE` that declares Apache-2.0 should include the complete canonical license text so recipients and automated tooling can identify the applicable terms.

## Actual behavior

Only the optional per-file header is present, and the license is not detected.

## Impact

Downstream users and license scanners cannot determine the repository's terms from the checked-in license file alone.

## Environment

- Default branch: `main`
- Commit: `2de83cb43b759c7b3d07c749c6a3efccd4528007`
- GitHub metadata observed on 2026-08-22: `NOASSERTION`

Open the repository's LICENSE file at commit 2de83cb43b759c7b3d07c749c6a3efccd4528007 and compare it with the canonical Apache-2.0 text at https://www.apache.org/licenses/LICENSE-2.0.txt. Replace the short header-only content with the complete canonical license text, then verify that LICENSE contains sections 1–9 and the appendix and that the repository license metadata can identify Apache-2.0.

Written by the indexing model from the issue text.