Add Oracle service - LLM wrapper

First service for Vi's nervous system:
- Oracle service with NATS integration
- vLLM backend for Qwen3-32B
- GPTQ quantization support
- Thinking mode sampling configs

Simplified from Lyra's patterns, ready to test.

🦊✺

requirements.txt

@@ -0,0 +1,4 @@
+# Vi dependencies
+nats-py>=2.6.0
+vllm>=0.4.0
+torch>=2.0.0