Fix .env.example: comment out DATABASE_URL, add all settings and commands reference

.env.example

@@ -53,21 +53,22 @@ MAX_CONVERSATION_HISTORY=20
 CONVERSATION_TIMEOUT_MINUTES=60
 
 # ===========================================
-# Database (PostgreSQL)
+# Database (PostgreSQL) - Optional
 # ===========================================
 # PostgreSQL connection URL (if not set, uses in-memory storage)
 # Format: postgresql+asyncpg://user:password@host:port/database
-DATABASE_URL=postgresql+asyncpg://daemon:daemon@localhost:5432/daemon_boyfriend
+# Uncomment to enable persistent memory:
+# DATABASE_URL=postgresql+asyncpg://daemon:daemon@localhost:5432/daemon_boyfriend
 
 # Password for PostgreSQL when using docker-compose
 POSTGRES_PASSWORD=daemon
 
 # Echo SQL statements for debugging (true/false)
-# DATABASE_ECHO=false
+DATABASE_ECHO=false
 
 # Connection pool settings
-# DATABASE_POOL_SIZE=5
-# DATABASE_MAX_OVERFLOW=10
+DATABASE_POOL_SIZE=5
+DATABASE_MAX_OVERFLOW=10
 
 # ===========================================
 # Web Search (SearXNG)
@@ -94,7 +95,19 @@ LOG_LEVEL=INFO
 # LOG_FORMAT=%(asctime)s - %(name)s - %(levelname)s - %(message)s
 
 # ===========================================
-# Monitoring Commands
+# Commands Reference
 # ===========================================
-# Use !status (admin only) for detailed metrics
-# Use !health (anyone) for quick health check
+# Monitoring:
+#   !status - Detailed metrics (admin only)
+#   !health - Quick health check (anyone)
+#
+# Memory (requires database):
+#   !setname <name> - Set your preferred name
+#   !clearname - Reset to Discord display name
+#   !remember <fact> - Tell the bot something about you
+#   !whatdoyouknow - See what the bot remembers
+#   !forgetme - Clear all facts about you
+#
+# Admin Memory:
+#   !setusername @user <name> - Set name for another user
+#   !teachbot @user <fact> - Add a fact about a user