Comprehensive test suite: orgs, requests import, RBAC super_admin, domain validation
New tests added:
- lib/types_test.go: OrgData, DealOrgData, RequestData, WorkstreamData JSON marshal tests
- lib/rbac_test.go additions: TestSuperAdminBypassesCheckAccess, TestIsSuperAdmin, TestIsSuperAdminRevokedGrant, TestSuperAdminCanGrantAnyRole
- api/orgs_test.go: TestCreateOrg, TestCreateOrgEmptyDomains, TestCreateOrgMissingDomains, TestListOrgs, TestSuperAdminCanListAllOrgs, TestGetOrg, TestUpdateOrg, and more
- api/requests_test.go: TestImportRequestsCSV, TestImportRequestsXLSX, TestImportSmartHeaderDetection, TestImportModeReplace, TestImportModeAdd, TestListRequests, TestPriorityNormalization, and more
- api/integration_test.go additions: TestFullDealWorkflow, TestSuperAdminSeeAllProjects
Total: 33 new test functions, all passing
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