Site Gateway v0.5.0-alpha.2

Corrective monitoring UI release

• Replaces misleading Provisioning wording with Certificate not detected
• Explains that Caddy has not stored a certificate without claiming issuance is in progress
• Standardizes the Logs domain dropdown at the same 44px control height
• Keeps Action Required status dots perfectly round and consistently sized
• Adds reliable footer spacing to hosted-site and proxy-host cards
• Corrects singular health-summary wording