Changes: - service.rs:198: Prefix unused `end_idx` with underscore - service.rs:26: Prefix unused `uploader` and `validator` fields with underscore - downloader.rs:44: Prefix unused `config` field with underscore - validator.rs:62: Prefix unused `config` field with underscore Result: 0 warnings in data_acquisition_service Verified: cargo check -p data_acquisition_service passes 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>