docs: secure all missing heavy-duty literature across armada

papers/references/Amari2016_Placeholder.md

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-# Information Geometry and Its Applications (Amari 2016)
-
-This reference is a published book/monograph. 
-Due to copyright and its format, the full PDF is not hosted in this repository.
-
-**Citation:**
-Amari, S. (2016). *Information Geometry and Its Applications.* Springer.

papers/references/Bastos2012_Placeholder.md

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-# Canonical microcircuits for predictive coding (Bastos 2012)
-
-This reference defines the anatomical pathways of the cortical microcircuit (L2/3, L4, L5, L6) and how they implement active inference.
-Due to copyright and its format, the full PDF is not hosted in this repository.
-
-**Citation:**
-Bastos, A. M. et al. (2012). *Neuron* **76**, 695.

papers/references/Schlosshauer2007_Placeholder.md

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-# Decoherence and the Quantum-to-Classical Transition (Schlosshauer 2007)
-
-This textbook provides the authoritative derivations of the Spin-Boson Hamiltonian, Ohmic spectral densities, and decoherence functions used to model system-environment interactions.
-Due to copyright and its format, the full PDF is not hosted in this repository.
-
-**Citation:**
-Schlosshauer, M. (2007). *Decoherence and the Quantum-to-Classical Transition*. Springer.

papers/references/Tegmark2000_Placeholder.md

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-# Importance of quantum decoherence in brain processes (Tegmark 2000)
-
-This paper proves that the decoherence timescale in the brain is ~10^-13 seconds, demonstrating the absolute physical limit of sustained quantum states at biological temperatures.
-Due to copyright and its format, the full PDF is not hosted in this repository.
-
-**Citation:**
-Tegmark, M. (2000). *Phys. Rev. E* **61**, 4194.