Review follow-up:
- runtime.test.js: add syncProject wiring tests with a real temp-dir
project and real project-config runtime — asserts reconcileLoopTasks is
driven with the discovered loops when the project path is known (task
created, nextRunAt computed) and that plain listing is used when the
path cannot be resolved (reconcile not called).
- service.js: DELETE on a loop-owned task is rejected with a 400 only
while its loop file still exists on disk; once the file is gone the
orphan task can be deleted directly instead of waiting for the next
reconcile. Tests use real temp files for both branches.
- DOCUMENTATION.md: delete semantics updated accordingly.
- PR description refreshed for the final HEAD (test counts, reconciliation
contract, evidence wording).