feat: Add Support for Optimistic Cloud Sync (#273)

* feat: Add support for background sync

* refactor: Maintain single source of truth for command defn

* fix: Code review fixes

* fix: Code review fixes

* docs: Add corner case inline doc

internal/audit/spawn_unix.go

@@ -0,0 +1,16 @@
+//go:build !windows
+
+package audit
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+// applyDetachAttrs configures cmd so that the child process is fully
+// detached from the parent's controlling terminal and process group. Setsid
+// makes the child its own session leader, so the parent can exit immediately
+// without the child receiving SIGHUP/SIGINT from the parent's shell.
+func applyDetachAttrs(cmd *exec.Cmd) {
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
+}