feat: announce dns p2p addresses

[ndrpp]

Fixes # .

Changes proposed in this PR:

• announce dns addresses p2p

[ndrpp]

/run-security-scan

[alexcos20]

AI automated code review (Gemini 3).

Overall risk: low

Summary:
This PR enhances the P2P address announcement logic within OceanP2P by explicitly handling DNS-based multiaddrs (dns, dns4, dns6, dnsaddr). It ensures that such addresses are announced if they do not resolve to a loopback address (localhost or 127.0.0.1). This change correctly prioritizes and allows public DNS P2P addresses, aligning with the feature of announcing DNS-p2p addresses.

Comments:
• [INFO][style] The addressString = maddr.nodeAddress().address line is duplicated and calculated in both the new DNS block and the subsequent generic IP block. While this is a minor detail and doesn't affect correctness, you could consider extracting this calculation to a single variable at the beginning of the shouldAnnounce method to slightly improve readability and avoid potential redundant calls to maddr.nodeAddress().

[alexcos20]

lgtm