RustyClaw v0.3.1

What's Changed

• ci: cargo audit gate by @ForkedInTime in #22
• chore: gitignore .playwright-mcp/ by @ForkedInTime in #25
• fix(net): SSRF guard, size caps and URL validation for the web tools (Phase 6) by @ForkedInTime in #23
• fix(permissions): sub-agents, /spawn and -p mode now go through the permission gate (Phase 5) by @ForkedInTime in #24
• style: adopt rustfmt repo-wide + CI gate (X.1) by @ForkedInTime in #26
• release: v0.3.1 — Phase 5 + Phase 6 security fixes by @ForkedInTime in #27

Full Changelog: v0.3.0...v0.3.1