Upgrade canonical logbook from full-score peer evidence with attribution

Merge hidden provenance into Conclusion and restore canonical page set

Add exact finite-sample counterexample for printed Claim 4 decoder

Verify NA-MQ hierarchy with general stochastic coupling

Clarify exact falsification of parity-algorithm claim

Update logbook: Reproduction: Positive Distribution Shift as a Framework for Understanding Tractable Learning

Update logbook: Repro - Positive Distribution Shift as a Framework for Understanding Tractable Learning

initial commit