* Daily Test Coverage Improver: Add comprehensive API Datalog tests
This commit adds comprehensive test coverage for Z3's Datalog/fixedpoint API functions, improving coverage from 0% to 17% (84/486 lines) in src/api/api_datalog.cpp.
Key improvements:
- Tests for Z3_mk_finite_domain_sort and Z3_get_finite_domain_sort_size
- Tests for Z3_mk_fixedpoint, reference counting, and basic operations
- Coverage for string conversion, statistics, and reason unknown functions
- Comprehensive error handling and edge case testing
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
* staged files
* remove files
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Co-authored-by: Daily Test Coverage Improver <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Claude <noreply@anthropic.com>
