fix(macos): rename LLAMA_MEMORY_LIMIT to LLAMA_SERVER_MEMORY_LIMIT in apple overlay

docker-compose.apple.yml used LLAMA_MEMORY_LIMIT but .env.example,
.env.schema.json, docker-compose.nvidia.yml, and the llama-server README
all document LLAMA_SERVER_MEMORY_LIMIT as the canonical variable name.
The mismatch meant the user's memory limit setting was silently ignored
on the macOS CPU path, always falling back to the 32G hardcoded default.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: yasinBursali

dream-server/docker-compose.apple.yml

@@ -15,7 +15,7 @@ services:
       resources:
         limits:
           cpus: '${LLAMA_CPU_LIMIT:-8.0}'
-          memory: ${LLAMA_MEMORY_LIMIT:-32G}
+          memory: ${LLAMA_SERVER_MEMORY_LIMIT:-32G}
         reservations:
           cpus: '2.0'
           memory: 4G