Add Docker containerization stack

- Dockerfile: multi-stage Python 3.13-slim, healthcheck, uvicorn CMD
- docker-compose.yml: full stack (cAIc, SearXNG, Qdrant, RabbitMQ,
  llama-server, Ollama) with healthchecks, volumes, secrets
- .dockerignore: exclude venv, tests, .git, models, secrets
- .env.example: all variables documented with generation hints
- scripts/setup.sh: first-run scaffolding (generates .env, secrets,
  SearXNG config, directories)
- searxng-settings.yml.dist: SearXNG config template
- models/README.txt: instructions for placing .gguf files
- config.py: add HW_STATE_PATH env var (CAIC_HW_STATE_PATH)
- hardware.py: read state path from config instead of hardcoded CWD
- requirements.txt: add missing psutil and jinja2

config.py

@@ -6,6 +6,7 @@ import os
 import re
 import ipaddress
 import logging
+from pathlib import Path
 
 log = logging.getLogger("caic")
 
@@ -76,6 +77,7 @@ BODY_LIMIT_UPLOAD_BYTES = MAX_UPLOAD_BYTES
 
 # --- RAG eviction ---
 RAG_MAX_VECTORS = int(os.environ.get("CAIC_RAG_MAX_VECTORS", "50000"))
+HW_STATE_PATH = os.environ.get("CAIC_HW_STATE_PATH", str(Path(__file__).parent / "hardware_state.json"))
 RAG_EVICTION_HIGH_WATER = 0.80
 RAG_EVICTION_LOW_WATER = 0.20
 RAG_EVICTION_BATCH = 1000