feat: add cuba-memorys to Community Servers

[lENADRO1910]

Cuba-Memorys

Persistent memory for AI agents with 12 Cuban-named tools.

Key Features:

• Knowledge graph with entities, observations, and typed relations
• Hebbian learning (Oja's rule) for memory strengthening
• 4-signal RRF fusion search (TF-IDF + full-text + trigrams + optional pgvector)
• GraphRAG enrichment with degree-1 neighbors
• FSRS spaced repetition for adaptive memory decay
• Anti-hallucination grounding with graduated confidence scoring
• REM Sleep autonomous background consolidation
• Graph analytics: PageRank, Louvain communities, betweenness centrality

Built on: PostgreSQL, auto-provisions via Docker.

GitHub: https://github.com/lENADRO1910/cuba-memorys
PyPI: cuba-memorys
Category: Community Server / Knowledge & Memory