Ports the fewo-webapp AuthInterceptor + requireAdmin onto three abstract
interfaces so consumer apps plug in their own user store, public paths,
and runtime config without forking:
auth/AuthPrincipal.hpp library-owned {id, username, role} value
auth/IAuthBackend.hpp resolveBy{Session,ApiKey,Cert}, hasActiveUsers,
deleteExpiredSessions
auth/IAuthPolicy.hpp isPublicPath, adminRoles, readonlyRoles,
setupModeActive (defaults: admin/readonly,
no public paths, setup off)
auth/IRuntimeConfig.hpp bindAddress, isLoopback
auth/AuthInterceptor.hpp intercept() running the same 6-step ladder as
fewo's original (public → setup → cert DN →
session/API key → CSRF → readonly)
auth/RequireRole.hpp requireUser + requireAdmin helpers reading
bundle data (config-driven role sets, not
hard-coded 'admin')
TokenHasher is passed in so the library doesn't prescribe SHA-256 vs.
whatever. Bundle keys match fewo's existing controllers so the consumer
migration in #418 is a straightforward adapter swap.
Smoke-compiled against oatpp 1.3.0 headers.
Closes fewo-webapp#413
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>