Switch to wizard-vicuna-uncensored:13b + optimized persona

- Changed all model references to wizard-vicuna-uncensored:13b
- Updated persona.txt for better character alignment
- Config updated in character_genesis.json
- Core engines updated (NaturalLanguageEngine, NaturalLanguageEngine_LLM)
- FastAPI runtime updated

config/character_genesis.json

@@ -2,7 +2,7 @@
   "version": "v6.0-pets",
   "name": "Natiris",
   "type": "companion",
-  "llm_model": "llama3-8b-abliterated:latest",
+  "llm_model": "wizard-vicuna-uncensored:13b",
   "personality": {
     "base_tone": "weiblich verlangend",
     "expressiveness": "high",