feat(09-01): scaffold cert-manager module + shared node-forge helpers (GREEN)
- cert-manager.module.ts: OnModuleInit + seedCertManagerModule (CERT-06)
- cert-manager.seed.ts: slug='cert-manager', category='security-tools', isSystem=true
- cert-manager.service.ts: detectFormat, toForgeBuffer, getFingerprint, parsePemChain;
operation stubs parseCert/splitCerts/mergeCerts/convertCert throw NotImplementedException
- cert-manager.controller.ts: 4 POST routes with FileInterceptor/FilesInterceptor
(5 MB limit each), @UseModule('cert-manager') guard, BadRequestException on missing input
- dto/: ParseCertDto, MergeCertsDto, ConvertCertDto
- app.module.ts: CertManagerModule added to imports array
- All 11 Vitest tests pass; type-check clean
schalli
8bb5cf208d