v0.3.0 - Lint, JSON output, parallel execution

What's New

New Commands

• supashield lint - static analysis of RLS policy expressions
• supashield test --json - machine-readable output for AI/CI integration
• supashield test --quiet - only show failures
• supashield test --parallel 8 - control concurrency (default: 4)

Performance

• Parallel test execution - significantly faster on large schemas
• Lower latency with silent mode for JSON/quiet output

Improvements

• Sensitive column grant detection in audit
• FK constraint failures handled (SKIPPED instead of ERROR)
• Copy-paste SQL fix suggestions in output
• Expanded data type support for test probes

Bug Fixes

• Fixed polcmd character code mapping in lint queries
• Cleaner output formatting