SNMP Discovery & Legacy Support

Improvements

• Support legacy daemons (pre-v0.14.0) in ServerPoll mode, allowing organizations with older deployments to continue seamless discovery (134b1290).
• Improve test reliability by adding retries and parallel requests for logo URL verification (bb83e84a).
• Allow authentication endpoints in demo mode

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Full Changelog: https://github.com/scanopy/scanopy/compare/v0.14.1...v0.14.2