C6x seed_tree_sha256 drift: forensic record
frozen-evidence commit : 41e89c6   HEAD: dc8339a

[1] whole-file SEED_TREE.toml sha256 (what summary.toml records)
  frozen : ef82d28fbbd7a00f7804bd81f8e9d85880484660a3fcaf29122f39b9b61c164d
  HEAD   : 2ada7e14540ec0ec50757606b3c3c03293cd849d6cb7e3f3011a3c0c2befccb7
  match  : False   <- the reported verify-only failure

[2] what C6x actually reads: node C6's world_spec (CONFIRMATORY_PLAN base_node_id=C6)
  frozen canonical sha256 : fa2373fcd023b7fcfc391f9f800b1ac18c2b058c3b1ffebd9a7c2456947283b5
  HEAD   canonical sha256 : fa2373fcd023b7fcfc391f9f800b1ac18c2b058c3b1ffebd9a7c2456947283b5
  match  : True   <- load-bearing closure is UNCHANGED

[3] every node differing between the two commits, and whether its world_spec moved
  C10  world_spec_changed=False keys_added=[]
  C4   world_spec_changed=False keys_added=['contrast_criteria']
  C5   world_spec_changed=True  keys_added=['contrast_criteria']
  C6   world_spec_changed=False keys_added=['contrast_criteria']
  C7   world_spec_changed=False keys_added=['contrast_criteria']
  C8   world_spec_changed=False keys_added=['contrast_criteria']
  C9   world_spec_changed=False keys_added=['contrast_criteria']

[4] conclusion: the whole-file hash is a superset of C6x's actual input closure.
    Drift is attributable to contrast_criteria blocks added at C4-C9 and the C10
    adjudication backfill - none of which C6x reads. Frozen numbers stand.