v0.4.2 - Security hardening

Install

docker pull ghcr.io/corveck79/mycelium:0.4.2

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Added

• WEBHOOK_SECRET auto-generation with copy button in admin Settings
• Metrics endpoint secured with optional Bearer token
• Rate limiting on authentication endpoints

Fixed

• Setup wizard now closes after first run (re-open via Settings)
• WebDAV auth hardening and security headers

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