feat: company portability — export/import companies and agents

Add company export, import preview, and import endpoints with manifest-
based bundle format. Includes URL key utilities for agents and projects,
collision detection/rename strategies, and secret requirement tracking.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/shared/src/index.ts

@@ -101,6 +101,22 @@ export type {
   Invite,
   JoinRequest,
   InstanceUserRoleGrant,
+  CompanyPortabilityInclude,
+  CompanyPortabilitySecretRequirement,
+  CompanyPortabilityCompanyManifestEntry,
+  CompanyPortabilityAgentManifestEntry,
+  CompanyPortabilityManifest,
+  CompanyPortabilityExportResult,
+  CompanyPortabilitySource,
+  CompanyPortabilityImportTarget,
+  CompanyPortabilityAgentSelection,
+  CompanyPortabilityCollisionStrategy,
+  CompanyPortabilityPreviewRequest,
+  CompanyPortabilityPreviewAgentPlan,
+  CompanyPortabilityPreviewResult,
+  CompanyPortabilityImportRequest,
+  CompanyPortabilityImportResult,
+  CompanyPortabilityExportRequest,
   EnvBinding,
   AgentEnvConfig,
   CompanySecret,
@@ -193,9 +209,25 @@ export {
   type ClaimJoinRequestApiKey,
   type UpdateMemberPermissions,
   type UpdateUserCompanyAccess,
+  portabilityIncludeSchema,
+  portabilitySecretRequirementSchema,
+  portabilityCompanyManifestEntrySchema,
+  portabilityAgentManifestEntrySchema,
+  portabilityManifestSchema,
+  portabilitySourceSchema,
+  portabilityTargetSchema,
+  portabilityAgentSelectionSchema,
+  portabilityCollisionStrategySchema,
+  companyPortabilityExportSchema,
+  companyPortabilityPreviewSchema,
+  companyPortabilityImportSchema,
+  type CompanyPortabilityExport,
+  type CompanyPortabilityPreview,
+  type CompanyPortabilityImport,
 } from "./validators/index.js";
 
 export { API_PREFIX, API } from "./api.js";
+export { normalizeAgentUrlKey, deriveAgentUrlKey } from "./agent-url-key.js";
 
 export {
   paperclipConfigSchema,