live discriminator before Phase 3: ALTERED-VALUE-B
live page count before Phase 3   : 4
--- CORRUPTION METHOD: truncate the dump mid-COPY-block (a realistic partial/corrupt dump)
size before: 141364
size after : 62000
last line now: COPY public.felhom_r356b_discriminator 
sha256 after: 30e84d2c0d0bcf3e7043459a0d135e96cdb65947f4138f181837b1ee35d2e087
