refactor: Rename dev scripts to manage for clarity

- Rename dev.bat -> manage.bat
- Rename dev.sh -> manage.sh
- Update script headers to clarify purpose
- Update PORTS.md reference

The 'manage' scripts are for managing running services (logs, restart, test, etc.)
The 'start-dev' scripts are for initial setup and starting the development environment

Author: raold

PORTS.md

@@ -48,7 +48,7 @@ Windows Host Machine
 docker-compose up -d
 
 # Or use convenience script
-./dev.bat start
+./manage.bat start
 ```
 
 ### 2. GPU Services on Windows Host

dev.bat renamed to manage.bat

@@ -1,5 +1,6 @@
 @echo off
-REM Docker-only development script for Windows
+REM Docker management script for Windows
+REM Use start-dev.bat for initial setup and startup
 
 if "%1"=="start" (
     echo Starting Second Brain services...

dev.sh renamed to manage.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
-# Docker-only development script
+# Docker management script for Mac/Linux
+# Use start-dev.sh for initial setup and startup
 
 case "$1" in
   start)