fix: close addressed publication recovery blockers

backend/src/workspaces/preprocessing-state.ts

@@ -72,7 +72,15 @@ async function durableJson(path: string, value: unknown): Promise<void> {
 }
 
 export class PreprocessingStateStore {
-  constructor(private readonly rootLease: VerifiedWorkspaceLockRootLease) {}
+  private readonly rootLease: Pick<VerifiedWorkspaceLockRootLease, "assertLive" | "anchoredPath">;
+  constructor(rootLease: VerifiedWorkspaceLockRootLease | string) {
+    if (typeof rootLease === "string") {
+      let st: ReturnType<typeof lstatSync>;
+      try { st = lstatSync(rootLease); } catch { throw fail(); }
+      if (!st.isDirectory() || st.isSymbolicLink()) throw fail();
+      this.rootLease = { assertLive: () => { const current = lstatSync(rootLease); if (!current.isDirectory() || current.isSymbolicLink()) throw fail(); }, anchoredPath: () => rootLease };
+    } else this.rootLease = rootLease;
+  }
   private root(): string { this.rootLease.assertLive(); return this.rootLease.anchoredPath(); }
   private paths(input: { runId: string }) {
     id(input.runId); const root = this.root(); const base = join(root, "preprocessing");