v1.1.0 - rugsnare-ref default to v1.3.0

Bumps the default rugsnare version to v1.3.0, which ships:

• Recursive schema decomposition (path-qualified leaves for nested anyOf/union changes)
• .agents/skills coverage (cross-platform Agent Skills standard location)
• ATR cross-references on every advisory signal and SARIF rule
• Skills advisory parity with pin layer