0.3.0: implement reactive triggers, >=90% test coverage, and Pentad synergy

[LucasArmstrong]

Summary of Changes in v0.3.0

• Reactive Triggers & 60Hz Engine: Enhanced browser behavior executor, priority triggers, and safe fail-closed interrupt handlers.
• Test Coverage: Achieved >=90% test coverage across Statements (91.66%), Lines (92.56%), and Functions (97.84%) with 158/158 passing tests.
• Multi-Node Matrix Testing: Verified npm run test:matrix passing across Node.js 18, 20, and 22.
• Audit & Governance: 0 npm audit vulnerabilities, documentation and manifest synchronization.