Cmdlets added: Request-InfisicalCertificate, Get-InfisicalCertificate, Get-InfisicalCertificates. Request supports BySubscriber/ByCa parameter sets, BouncyCastle CSR generation (RSA/ECDSA/Ed25519), local-key generation, -Install/-InstallChain (chain certs routed to Root vs CertificateAuthority by self-signed status), idempotency reuse with -AllowRenewal/-RenewalThresholdDays, local chain reconstruction with -LocalChainOnly opt-out, Infisical bundle fallback when local stores are incomplete, and private-key protection modes (Exportable/LocalOnly/NonExportable/Ephemeral) via -PrivateKeyProtection plus -PersistKey/-MachineKey/-PrivateKeyPath.
Install-InfisicalCertificate fix: chain certs were previously dumped into CertificateAuthority unconditionally. They are now routed by Subject==Issuer (self-signed -> Root, otherwise -> CertificateAuthority), matching Request-InfisicalCertificate. Routing centralized in InfisicalCertificateRequestHelpers.GetChainCertificateTargetStore and a new InstallChain(IEnumerable<X509Certificate2>,...) overload.
Help: authored Module/PSInfisicalAPI/en-US/PSInfisicalAPI.dll-Help.xml covering all 39 cmdlets (synopsis, description, notes, two examples per cmdlet: one-liner + OrderedDictionary splat with preceding Get- resolvers for IDs/slugs).
Build pipeline: build.ps1 stages the help XML into bin/<culture>/ next to the DLL during publish (hard-fails if missing or has zero <command:command> entries). Test-ModuleImports now enumerates every exported cmdlet via Get-Command, cross-checks against expected names, and asserts non-empty synopsis (rejecting auto-generated cmdlet-name fallback), non-empty description, and at least one example with a non-empty <dev:code> block.
Tests: 230/230 passing (up from 190).
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