Dexter 1.0.2

Changes

• Add bash permission rules engine with command parser, allow/ask/deny rules persisted in .dexter/settings.json, and an "always allow" approval option for simple commands
• Add GPT 5.6 model family (Sol, Terra, Luna) as the default OpenAI models, with auto-upgrade from gpt-5.5/5.4/5.2
• Add insider ownership tool for SEC Forms 3/5 insider holdings (positions, options, RSUs)
• Add beneficial ownership tool for SEC 13D/13G stakes (activist and passive 5%+ owners)