- vote/merge/reduce/collect convergence proven end-to-end; failure threshold
aborts a swarm below min_success_ratio (integer per-mille) and completes
when failures are within tolerance, with worker.failed + swarm.aborted
tracked durably.
- worked around three El runtime/codegen semantics surfaced during the build:
json_set inserts RAW (use json_set_str for string values); json_set cannot
update an existing key (vote tallies via list rescanning); json_array_get
keeps quotes (use json_array_get_string). Also: float division is unreliable
(swarm uses integer math), and a let-rebind in a deeply nested if/else does
not propagate outward (accumulators kept at one block level).
test_convergence: 8/8; test_swarm: 12/12.
bigmerge