AkurAI-Build

artifact.rs tests: give the SPA Fallback property test real coverage (closes #10) 32874 db.rs fsguard: one implementation of the hardened filesystem checks 52382 deploy.rs deploy: route copy_regular_file's symlink-free open through fsguard (closes #11) 21231 fsguard.rs fsguard: one implementation of the hardened filesystem checks 2077 lib.rs fsguard: one implementation of the hardened filesystem checks 199 main.rs cli: propagate manifest-read errors so doctor exits 1, not 3 (closes #9) 18195 server.rs fsguard: one implementation of the hardened filesystem checks 73532