fix(test): complete session_id→task_id migration in test assertions

The previous PR #3481 only added a not.toContain check but left the
final toContain assertion still expecting task(session_id=...).
Also updates dynamic-agent-core-sections.ts and verification-reminders.ts
which still had session_id format after the refactor.

src/hooks/atlas/index.test.ts

@@ -957,7 +957,8 @@ session_id: ses_untrusted_999
       const updatedState = readBoulderState(TEST_DIR)
       expect(updatedState?.task_sessions?.["todo:1"]).toBeUndefined()
       expect(output.output).not.toContain('task(session_id="ses_untrusted_999"')
-      expect(output.output).toContain('task(session_id="<session_id>"')
+      expect(output.output).not.toContain('task(task_id="ses_untrusted_999"')
+      expect(output.output).toContain('task(task_id="<session_id>"')
 
       cleanupMessageStorage(sessionID)
     })