feat: memory system fixes and Redis config cleanup (v1.3.0)

- Fix Qdrant client to use query_points API (qdrant-client >= 1.10)
- Rename REDIS_DB to REDIS_BENCHMARK_DB for clarity
- Update Redis defaults to match stack allocation (benchmark=6, memory=1)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.env.example

@@ -21,7 +21,8 @@ SEARXNG_TIMEOUT=30
 # Redis Configuration
 REDIS_HOST=redis-shared
 REDIS_PORT=6379
-REDIS_DB=1
+REDIS_MEMORY_DB=1
+REDIS_BENCHMARK_DB=6
 REDIS_TIMEOUT=5
 
 # Logging
@@ -30,4 +31,4 @@ ENABLE_BENCHMARKS=true
 # Note: Log format is auto-selected based on ENVIRONMENT (console for dev, json for production)
 
 # CORS (comma-separated list)
-CORS_ORIGINS=*
+CORS_ORIGINS=["*"]