improve: fix author name and add multi-line export list detection

[Coding-Dev-Tools]

Automated improvement by dev-engineer. Changes:

• Fix author name in pyproject.toml (DevForge -> Revenue Holdings)
• Fix multi-line export list detection in scanner.py (handle comments, aliases, multi-line blocks)
• Add comprehensive test coverage for multi-line export lists (5 new tests)
• Update CLI edge case tests to use CliRunner instead of subprocess
• Add cowork-auto-pr workflow for automated PR creation

[github-actions]

🤖 Automated Code Review

✅ Ruff Lint — No issues

⚠️ Ruff Format — Formatting needed

Would reformat: src/deadcode/__main__.py
Would reformat: src/deadcode/cli.py
Would reformat: src/deadcode/scanner.py
Would reformat: tests/test_cli_edge_cases.py
Would reformat: tests/test_config_and_fixes.py
Would reformat: tests/test_scanner.py
6 files would be reformatted, 3 files already formatted

✅ Secret Detection — Clean

✅ Large Files — Within limits

📊 Diff Stats — 0 file(s) changed

---

Verdict: ⚠️ Warnings — Lint/format issues found. Recommend fixing before merge.

Automated by Coding-Dev-Tools/.github reusable workflow.