feat(go): durable transaction engine and Kiro IDE 1.0 adapter

Split the monolithic transaction into focused modules: append-only
crash-recoverable journal under ~/.elydora/transactions with owner
tokens and per-transaction namespaces, staged atomic publication
(stage .pending, fsync, rename, fsync), platform-specific atomic
replacement (MoveFileEx, renameat2, renamex_np), private-directory
hardening per OS, lock-guarded recovery, and workspace cleanup that
removes only transaction-created empty directories.

Add the Kiro IDE 1.0 plugin: strict v1 hook schema with one enabled
PreToolUse guard and PostToolUse audit pair bound to the active
workspace, agent-to-workspace identity binding in runtime config, and
exact migration of the legacy elydora-audit.kiro.hook contract.

Gates: go test ./... and -race pass, go vet clean, govulncheck reports
zero reachable vulnerabilities, git diff --check clean.

cmd/elydora/droid_cli_test.go

@@ -14,6 +14,7 @@ func prepareDroidCLIEnvironment(t *testing.T) (string, string, []string) {
 	t.Helper()
 	root := t.TempDir()
 	homeDir := filepath.Join(root, "home with spaces and 'quote %DROID%")
+	preparePrivateCLITestHome(t, homeDir)
 	workspace := filepath.Join(root, "workspace with spaces")
 	if err := os.MkdirAll(filepath.Join(workspace, ".git"), 0700); err != nil {
 		t.Fatalf("create Factory Droid CLI workspace: %v", err)