fix(p2p): allow longer Tor onion connection setup

[binarybaron]

Problem

High-effort Tor onion-service proof-of-work can take longer than the uniform 15-second libp2p connection-setup timeout, making otherwise reachable makers impossible to connect to.

Solution

• Apply a five-minute connection-setup timeout only to outbound multiaddresses containing /onion3.
• Retain the existing 15-second timeout for non-onion outbound addresses and inbound connection upgrades.
• Preserve Arti internal rendezvous, introduction, circuit, and stream timeouts; the five-minute timeout is the final upper bound for the complete onion attempt.
• Add regression coverage for onion versus regular timeout selection.

libp2p continues racing known maker addresses concurrently, so a healthy clearnet address can win without waiting for onion PoW.

Closes #1190

Validation

• cargo test -p swap --lib network::transport::tests::onion_dials_use_the_longer_connection_setup_timeout
• cargo c --all-features
• cargo c --tests
• cargo c --all-targets
• just docker_test happy_path

All passed. Existing unrelated compiler warnings remain.

AI usage

OpenAI Codex assisted with code investigation, implementation, and validation.

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