retag: logbook.json (verbatim titles)

C2 upgrade: real-task DeltaL <= Lipschitz 28/28 MNIST+DistilGPT2

C2 upgrade: MNIST real CE + DistilGPT2/KAN runtime dL (close a7b5c871 Toy)

C2 upgrade: multi-arch Delta-L (MLP+CNN+Transformer 63/63) + ResNet18 dense-teacher

C2 upgrade: add actual loss-change verification (21/21 hold, Theorem 4.2)

v2: MLP+GPT-2 sweep, Claim 2 VERIFIED across 3 arch families (28/28 configs)

Update logbook: Reproduction: Effective Model Pruning — Measuring the Redundancy of Model Components