chainReorgs and orphaned blocks

Reorgs are routine on PCoin, not exceptional. getchaintips on the seed node has returned around 66 tips over ~2100 blocks — roughly a 3% stale rate — because stale rate tracks propagation delay divided by block spacing, and the first ~2016 blocks were seconds apart. This log is the index's own audit trail: every time the node switched to a better chain, the index unwound the losing blocks by subtracting back the exact per-address amounts it had added, and kept the orphaned headers below so they resolve to a page instead of a 404.