refactor: Improve backup-env-files.sh for temp file handling and enhance crontab entries for .env backups

docs/env-backup-integration-guide.md

@@ -5,6 +5,7 @@
 Your .env backup system is now fully operational! Here's what was set up:
 
 ### ✅ What's Working
+
 - **31 .env files** discovered across your Docker containers
 - **30 files backed up** successfully to `/home/acedanger/.env-backup`
 - **Private Gitea repository** configured and pushed successfully
@@ -14,6 +15,7 @@ Your .env backup system is now fully operational! Here's what was set up:
 ### 🔧 Integration Options
 
 #### 1. Manual Backup (Current)
+
 ```bash
 cd /home/acedanger/shell
 ./backup-env-files.sh              # Regular backup
@@ -22,14 +24,18 @@ cd /home/acedanger/shell
 ```
 
 #### 2. Automated Daily Backup (Recommended)
+
 Add to your crontab for daily backups at 2 AM:
+
 ```bash
 # Daily .env backup at 2 AM
 0 2 * * * /home/acedanger/shell/backup-env-files.sh >/dev/null 2>&1
 ```
 
 #### 3. Integration with Existing Backup Scripts
+
 The backup integrates with your existing backup system through:
+
 - **Logs**: Written to `/home/acedanger/shell/logs/env-backup.log`
 - **Completion**: Tab completion available via `env-backup-completion.bash`
 - **Validation**: Use `validate-env-backups.sh` for integrity checks
@@ -64,16 +70,19 @@ The backup integrates with your existing backup system through:
 ### 🔄 Common Operations
 
 #### Restore Files (if needed)
+
 ```bash
 ./backup-env-files.sh --restore
 ```
 
 #### Force Backup (ignore unchanged files)
+
 ```bash
 ./backup-env-files.sh --force
 ```
 
 #### Check What Would Change
+
 ```bash
 ./backup-env-files.sh --dry-run
 ```
@@ -95,27 +104,32 @@ If you lose your filesystem:
 ### 🔧 Maintenance
 
 #### Weekly Validation (Recommended)
+
 ```bash
 # Add to crontab for weekly validation
 0 3 * * 0 /home/acedanger/shell/validate-env-backups.sh >/dev/null 2>&1
 ```
 
 #### Cleanup Old Logs (Monthly)
+
 The system automatically manages logs, but you can clean them manually if needed.
 
 ### 🆘 Troubleshooting
 
 #### Push Fails
+
 - Check SSH key: `ssh -T git@git.ptrwd.com`
 - Verify repository exists and is private
 - Check network connectivity
 
 #### Files Not Found
+
 - Verify Docker directory structure: `ls -la ~/docker/*/`
 - Check file permissions
 - Run with `--list` to see what's detected
 
 #### Restore Issues
+
 - Ensure target directories exist
 - Check file permissions
 - Use `--dry-run` first to preview
@@ -123,6 +137,7 @@ The system automatically manages logs, but you can clean them manually if needed
 ## Integration Complete! 🎉
 
 Your .env files are now safely backed up and version controlled. The system will:
+
 1. Track all changes to your .env files
 2. Maintain a secure backup in your private Gitea
 3. Provide easy restore capabilities