upgradePauseWindowBlocks top-level constant

int const upgradePauseWindowBlocks

The pause's window in blocks: the core's PROPOSAL_ANCHOR_DRIFT_MAX_BLOCKS, the K the SDK refuses sends within before an activation, surfaced here once (a test pins it to the core's source). A paused state always carries the SDK's blocksLeft; only one the SDK did not produce lacks it, and that reads as this, the longest wait.

Implementation

const int upgradePauseWindowBlocks = 20;