Ensure agent home directories exist before use

mkdir -p the CODEX_HOME directory in codex-local adapter and the
agentHome directory in the heartbeat service before passing them to
adapters. This prevents CLI tools from erroring when their home
directory hasn't been created yet. Covers all local adapters that
set AGENT_HOME.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

server/src/services/heartbeat.ts

@@ -2146,7 +2146,11 @@ export function heartbeatService(db: Db) {
       repoRef: executionWorkspace.repoRef,
       branchName: executionWorkspace.branchName,
       worktreePath: executionWorkspace.worktreePath,
-      agentHome: resolveDefaultAgentWorkspaceDir(agent.id),
+      agentHome: await (async () => {
+        const home = resolveDefaultAgentWorkspaceDir(agent.id);
+        await fs.mkdir(home, { recursive: true });
+        return home;
+      })(),
     };
     context.paperclipWorkspaces = resolvedWorkspace.workspaceHints;
     const runtimeServiceIntents = (() => {