Chore: Replace unreachable initial peer IP in default config

[dev-adamant-im]

Description

Update the first default peer entry in config.default.json from 5.161.68.61:36666 to 95.216.114.252:36666.

The branch contains only this config change. The previous IP timed out during a TCP reachability check, while the replacement IP accepted a connection on port 36666.

Related issue

Closes #223

External links (optional)

None.

Screenshots or videos (optional)

Not applicable.

Breaking changes

No.

This change updates a default bootstrap peer entry only. It does not modify consensus rules, transport protocol behavior, or database/schema state.

How to test

1. Review the branch diff against dev and confirm only config.default.json changed.
2. Validate the JSON file:
   jq empty config.default.json
3. Check old peer reachability:
   nc -G 3 -vz 5.161.68.61 36666
   Expected result: timeout.
4. Check new peer reachability:
   nc -G 3 -vz 95.216.114.252 36666
   Expected result: successful TCP connection.

Notes for reviewers

• Scope is intentionally minimal and limited to one default peer entry.
• No automated tests were added because this is a config-only bootstrap peer update.
• Manual verification covered JSON validity and peer TCP reachability.

Checklist

• Code is formatted
• Tests added/updated (if needed)
• Documentation updated (if needed)
• Changes tested in all relevant environments