Rename: jarvisChat → cAIc (product name)

- jarvisChat/JarvisChat/jarvischat → cAIc/cAIc/caic (branded/lower)
- JARVISCHAT_ env vars → CAIC_
- jc- script/config prefix → caic-
- jarvis_rag → caic_rag
- jarvischat.db / volumes → caic.db / caic_*
- AMQP vhost/user jarvischat → caic
- Syslog, loggers, docstrings all updated
- 47 files, zero stale references, 148 tests pass

routers/rag_admin.py

@@ -8,7 +8,7 @@ from fastapi.responses import JSONResponse
 from eviction import get_rag_operational_stats, EVICTION_LOG
 from rag import QDRANT_URL, RAG_COLLECTION
 
-log = logging.getLogger("jarvischat")
+log = logging.getLogger("caic")
 router = APIRouter()