Enforce HTTPS for all downloads to eliminate security vulnerabilities

- Convert 16 HTTP URLs to HTTPS across 3 critical scripts
- Dell OMSA script: Ubuntu archive and Dell repository URLs now use HTTPS
- Proxmox legacy script: Download URLs converted to secure connections
- SSL stack script: Apache source URLs updated to official archive
- Update documentation to reflect resolved security issues
- Mark HTTPS enforcement as completed in todo lists

This addresses the second critical security concern from the security review,
eliminating man-in-the-middle attack vectors during package downloads.

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

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

ProjectCode/legacy/prox7.sh

@@ -1,8 +1,8 @@
 #!/bin/bash
 
 rm -f /etc/apt/sources.list.d/*
-echo "deb http://download.proxmox.com/debian/pve bookworm pve-no-subscription" > /etc/apt/sources.list.d/pve-install-repo.list
-wget http://download.proxmox.com/debian/proxmox-release-bookworm.gpg -O /etc/apt/trusted.gpg.d/proxmox-release-bookworm.gpg
+echo "deb https://download.proxmox.com/debian/pve bookworm pve-no-subscription" > /etc/apt/sources.list.d/pve-install-repo.list
+wget https://download.proxmox.com/debian/proxmox-release-bookworm.gpg -O /etc/apt/trusted.gpg.d/proxmox-release-bookworm.gpg
 apt update && apt -y full-upgrade
 apt-get -y install ifupdown2 ipmitool ethtool net-tools lshw