Rename Foundry handoffs to tasks (#239)

* Restore foundry onboarding stack

* Consolidate foundry rename

* Create foundry tasks without prompts

* Rename Foundry handoffs to tasks

foundry/packages/backend/src/services/foundry-paths.ts

@@ -0,0 +1,20 @@
+import type { AppConfig } from "@sandbox-agent/foundry-shared";
+import { homedir } from "node:os";
+import { dirname, join, resolve } from "node:path";
+
+function expandPath(input: string): string {
+  if (input.startsWith("~/")) {
+    return `${homedir()}/${input.slice(2)}`;
+  }
+  return input;
+}
+
+export function foundryDataDir(config: AppConfig): string {
+  // Keep data collocated with the backend DB by default.
+  const dbPath = expandPath(config.backend.dbPath);
+  return resolve(dirname(dbPath));
+}
+
+export function foundryRepoClonePath(config: AppConfig, workspaceId: string, repoId: string): string {
+  return resolve(join(foundryDataDir(config), "repos", workspaceId, repoId));
+}