fix: update error messages to say localhost/loopback

Error messages for HTTP URL rejection now correctly say
'localhost/loopback' instead of just 'localhost', matching the
actual _validate_url_scheme behavior that allows any loopback host.

Author: mnriem

src/specify_cli/__init__.py

@@ -5030,7 +5030,7 @@ def _validate_and_install_local(yaml_path: Path, source_label: str) -> None:
             _validate_url_scheme(from_url)
         except ValueError as exc:
             console.print(f"[red]Error:[/red] Invalid URL: {exc}")
-            console.print("URL must use HTTPS for security. HTTP is only allowed for localhost URLs.")
+            console.print("URL must use HTTPS for security. HTTP is only allowed for localhost/loopback URLs.")
             raise typer.Exit(1)
 
         console.print("[yellow]Warning:[/yellow] Installing from external URL.")
@@ -5058,7 +5058,7 @@ def _validate_and_install_local(yaml_path: Path, source_label: str) -> None:
         try:
             _validate_url_scheme(source)
         except ValueError:
-            console.print("[red]Error:[/red] Only HTTPS URLs are allowed, except HTTP for localhost.")
+            console.print("[red]Error:[/red] Only HTTPS URLs are allowed, except HTTP for localhost/loopback.")
             raise typer.Exit(1)
 
         import tempfile