mesh/delivery merged: source.main moved to novox/mesh-delivery@b842b9422d2a
mesh/check checking 9db15c7cf4fc on b842b9422d2a
builder_stuck, checker_kept, checker_verdicts, checker_status, checker_previews, checker_pull and checker_try listed a bucket of thousands of keys and read each value (builder_stuck also its history) one round trip at a time before filtering, so they timed out at 30 s. Now keys are narrowed by what the key carries first, history is read only for rows kept, values are read sixteen at a time, at most 1000 a call with the answer saying it was cut, steps newest first, a new try reads only the newest 64 tries, and each tool logs the values read and the time taken. Same kind as the view's fix (PR 52); the helper is copied, not put in mesh-sdk, as a few lines do not earn a group delivery.