Expand data model with companies, approvals, costs, and heartbeats

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>

packages/shared/src/index.ts

@@ -1,41 +1,85 @@
 export {
+  COMPANY_STATUSES,
   AGENT_STATUSES,
+  AGENT_CONTEXT_MODES,
+  AGENT_ADAPTER_TYPES,
   AGENT_ROLES,
   ISSUE_STATUSES,
   ISSUE_PRIORITIES,
   GOAL_LEVELS,
+  GOAL_STATUSES,
+  PROJECT_STATUSES,
+  APPROVAL_TYPES,
+  APPROVAL_STATUSES,
+  HEARTBEAT_INVOCATION_SOURCES,
+  HEARTBEAT_RUN_STATUSES,
+  type CompanyStatus,
   type AgentStatus,
+  type AgentContextMode,
+  type AgentAdapterType,
   type AgentRole,
   type IssueStatus,
   type IssuePriority,
   type GoalLevel,
+  type GoalStatus,
+  type ProjectStatus,
+  type ApprovalType,
+  type ApprovalStatus,
+  type HeartbeatInvocationSource,
+  type HeartbeatRunStatus,
 } from "./constants.js";
 
 export type {
+  Company,
   Agent,
+  AgentKeyCreated,
   Project,
   Issue,
+  IssueComment,
   Goal,
+  Approval,
+  CostEvent,
+  CostSummary,
+  HeartbeatRun,
+  DashboardSummary,
   ActivityEvent,
 } from "./types/index.js";
 
 export {
+  createCompanySchema,
+  updateCompanySchema,
+  type CreateCompany,
+  type UpdateCompany,
   createAgentSchema,
   updateAgentSchema,
+  createAgentKeySchema,
   type CreateAgent,
   type UpdateAgent,
+  type CreateAgentKey,
   createProjectSchema,
   updateProjectSchema,
   type CreateProject,
   type UpdateProject,
   createIssueSchema,
   updateIssueSchema,
+  checkoutIssueSchema,
+  addIssueCommentSchema,
   type CreateIssue,
   type UpdateIssue,
+  type CheckoutIssue,
+  type AddIssueComment,
   createGoalSchema,
   updateGoalSchema,
   type CreateGoal,
   type UpdateGoal,
+  createApprovalSchema,
+  resolveApprovalSchema,
+  type CreateApproval,
+  type ResolveApproval,
+  createCostEventSchema,
+  updateBudgetSchema,
+  type CreateCostEvent,
+  type UpdateBudget,
 } from "./validators/index.js";
 
 export { API_PREFIX, API } from "./api.js";