Add new DB schemas: companies, agent_api_keys, approvals, cost_events,
heartbeat_runs, issue_comments. Add corresponding shared types and
validators. Update existing schemas (agents, goals, issues, projects)
with new fields for company association, budgets, and richer metadata.
Generate initial Drizzle migration. Update seed data.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Shared TypeScript types, Zod validators, API contract definitions,
and constants used by both server and UI. Covers agents, goals,
issues, projects, and activity entities.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
