build：inject version via ldflags instead of hardcoding chore：fix filename typo memmorystore → memorystore chore：remove dead code (LoadConfigFromEnv, commented-out lines) fix(auth)：check token store Set errors fix(certgen)：reduce CA cert validity from 10 to 5 years fix(client)：replace fixed 8KB buffer with ReadAll fix(config)：return parse errors instead of silent ignore fix(daemon)：check Set/Delete errors in command handlers fix(daemon)：fix unreachable expired-token branch fix(daemon)：log shutdown errors, wait for background tasks fix(daemon)：remove InsecureSkipVerify from outbound TLS fix(daemon)：stop busy-loop on socket accept errors fix(storage)：RWMutex for FileStore, sentinel errors, defensive copies fix(storage)：add mutex to KeyringStore for thread safety fix(storage)：add mutex to PassStore for thread safety fix(storage)：restore mutex protection in KeyringStore.Dump fix(storage)：stop token secret leak to stdout in pass store refactor(api)：remove pointer-to-interface anti-pattern refactor(daemon)：extract store creation from nested if-else