test(session): pass a session ref to CodexAdapter.readSession

[SaulMoro]

Summary

main fails tsc since #1146 merged:

src/__tests__/session-cmd.test.ts(1579,58): error TS2345: Argument of type 'string' is not assignable to parameter of type 'SessionReadRef'.

#1146 added a test that calls new CodexAdapter().readSession(SID). #1135, merged just before it, changed readSession to take a SessionReadRef. Each PR passed CI on its own base. This passes { sessionId: SID }, as the other adapter tests in the file already do.

-    const session = await new CodexAdapter().readSession(SID);
+    const session = await new CodexAdapter().readSession({ sessionId: SID });

Evidence

• On main at 7ca23dc: npx tsc --noEmit fails with the error above.
• On this branch: npx tsc --noEmit passes, and npx vitest run src/__tests__/session-cmd.test.ts -t 'freeform tool calls' passes (1 test).
• Test-only change, so no CLI run.

Merge Danger

Door: two-way. One line in one test. Until this merges, the CI type check fails for every PR tested against main.

[github-actions]

No findings in the requested diff.

The change is limited to one test call, passing { sessionId: SID } instead of a string. The PR description documents a passing type check and focused unit test—sufficient for this test-only change; no real-CLI record is required.

I did not run, build, or install anything from the PR.