Show ping/latency next to connection path score output

[ehsanking]

Motivation

• Provide immediate, human-readable verification that connectivity checks actually measured reachability and latency by surfacing ping metrics alongside each successful connection path score.
• Make it easier for users to trust a reported score without opening full reports or running separate tools.

Description

• Added parsePingMetrics to iran_connectivity.js to extract transmitted, received, packetLossPercent, and averageLatencyMs from raw ping output.
• Persisted parsed ping stats on each connectivity result as sourcePingStats and targetPingStats so metrics are available for reporting and future use.
• Updated the success log for connection path scores to include inline badges showing {ping received/transmitted} and {latency <avg> ms} with N/A fallbacks when parsing fails.
• All changes are additive and do not modify scoring logic or security/authorization behavior.

Testing

• Ran the repository test suite with npm test which runs node --test tests/*.test.js, and all tests passed (6/6).
• No other automated checks were modified or required for this change.

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Codex Task