Add ASF release compliance checks

[jianguotian]

Purpose

Add ASF release compliance checks and refresh Rust dependency license reports so release vote issues are caught earlier.

Changes

• Add tools/check_license_headers.py to verify tracked text files have ASF license headers or explicit exemptions.
• Run the license header check in GitHub Actions CI.
• Normalize generated Rust dependency reports by trimming trailing whitespace in tools/dependencies.py.
• Regenerate Rust DEPENDENCIES.rust.tsv reports from the current Cargo.lock.

Tests

• python3 tools/validate_asf_yaml.py
• python3 tools/check_license_headers.py
• Parsed .github/workflows/ci.yml with PyYAML
• /root/miniconda3/envs/py311/bin/python3.11 tools/dependencies.py generate
• /root/miniconda3/envs/py311/bin/python3.11 tools/dependencies.py check
• git diff --check
• Source-release RAT scan: Archives: 0, 0 Unknown Licenses with generated DEPENDENCIES.rust.tsv files excluded