Remove automatic deployment prompt from setup script

Changes:
- scripts/setup-homelab.sh: Remove interactive deployment prompt
  - Users must now run deploy script manually
  - Simplifies both scripts (no sudo workarounds needed)
  - Clearer two-step process: setup then deploy

- Documentation updates:
  - README.md: Updated step 3-4 with manual deployment
  - docs/getting-started.md: Removed step 6 (log out), clarified steps
  - docs/manual-setup.md: Added sudo to deploy command
  - docs/troubleshooting/COMMON-ISSUES.md: Added sudo to all deploy commands

Rationale:
- Automatic deployment via 'su -' cannot work with sudo requirement
- Manual two-step process is clearer and more reliable
- Setup focuses on configuration, deploy focuses on services

docs/troubleshooting/COMMON-ISSUES.md

@@ -96,7 +96,7 @@ docker compose up -d
 **Solution:**
 ```bash
 # Re-run deployment script (safe - won't affect running services)
-./scripts/deploy-homelab.sh
+sudo ./scripts/deploy-homelab.sh
 
 # Or manually fix:
 cd /opt/stacks/dashboards/homepage
@@ -182,7 +182,7 @@ sudo systemctl stop systemd-resolved
 ls -la /opt/stacks/
 
 # Re-run deployment to copy stacks
-./scripts/deploy-homelab.sh
+sudo ./scripts/deploy-homelab.sh
 ```
 
 ## Performance Issues
@@ -235,7 +235,7 @@ sudo ./scripts/reset-test-environment.sh
 
 # Then re-run setup and deploy
 sudo ./scripts/setup-homelab.sh
-./scripts/deploy-homelab.sh
+sudo ./scripts/deploy-homelab.sh
 ```
 
 ### Partial Reset (Single Stack)