chore(master): release 2.79.9

[github-actions]

🤖 I have created a release beep boop

2.79.9 (2026-09-04)

Bug Fixes

• admin-ui: remove the unreferenced static landing page (eea5024)
• admin-ui: render the delivery-test and address-list fragments server-side (4443c32)
• deps: update dependencies (2f32929)
• deps: update dependencies and drop the message browser stylesheet exception (1933e5d)
• docker: move the image to Node 24 and drop npm from the runtime layer (ad190d3)
• security: require a nonce on stylesheets and tag the machine-facing routes (cbcd4cb)
• security: send a nonce-based Content-Security-Policy and the remaining security headers (4f2900e)
• security: vet autodiscovery egress, throttle proxy logins and add response headers (74856cf)

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