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/qwen_e2e_test.go

@@ -45,6 +45,7 @@ func TestQwenCLIInstallStatusAndUninstallEndToEnd(t *testing.T) {
 		t.Fatalf("build Elydora CLI: %v\n%s", err, output)
 	}
 	home := filepath.Join(root, "home")
+	preparePrivateCLITestHome(t, home)
 	workspace := filepath.Join(home, "workspace")
 	if err := os.MkdirAll(workspace, 0755); err != nil {
 		t.Fatalf("create workspace: %v", err)