fix: remove accumulator cyclic shift + add KNOWLEDGE.md Fixes the shift mismatch bug (PR review item #1): - accumulator.rs: removed cyclic shift from accumulate_frame(). crystallize() and unbind() now read/write the same cell positions. Decorrelation handled by ZeckBF17 golden-step at encoding level. - universal_perception.rs: same fix for UniversalAccumulator. - Removed unused PHI, GOLDEN_ANGLE, PI constants from both files. Added KNOWLEDGE.md: complete architectural reference for the Savant research agent. Documents the L2-scores-lower-than-L1 insight (integrated BitVec destroys plane separation), the correct two-curve Pareto frontier, all known bugs, and success criteria. #22