Checklist

• I have read the coding guide.
• My change requires a documentation update, and I have done it.
• I have added tests to cover my changes.
• I have filled out the description and linked the related issues.

Description

• Give each underlay address a dedicated 15-second connection timeout
• Prevents later addresses from being starved of connection time
• Increase kademlia's total peer connection timeout from 15s to 45s to accommodate multiple address attempts
• Each bootnode connection attempt now gets the full 45s budget

Previously, when connecting to a peer with multiple underlay addresses, all addresses shared a single timeout context. This meant later addresses had little to no time remaining for connection attempts. Now each address receives its own fresh 15-second timeout, ensuring fair connection attempts to all underlay addresses.

In kademlia's bootnode connection logic, the global 15-second timeout has been removed and replaced with a per-connection 45-second timeout, allowing multiple addresses per peer to be tried sequentially with adequate time budget.

Open API Spec Version Changes (if applicable)

Motivation and Context (Optional)

Related Issue (Optional)

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