Normalize relay URIs before allowlist matching

[Copilot]

Lido allowlisted relay URIs may include trailing /, while relays observed from clients may not. This mismatch can incorrectly classify valid relays as blacklisted and undercount mandatory relay usage.

• What changed

  • Added URI normalization in relay comparison flow to strip trailing slashes before matching.
  • Applied normalization consistently to both:
    • allowlisted relays from the contract
    • relays reported as used by the node

• Behavioral impact

  • Equivalent relay URIs now match regardless of trailing /.
  • Blacklist detection and mandatory-relay counting are based on canonicalized URI values, reducing false negatives/positives from formatting differences.

• Test coverage updates

  • Added focused normalization test cases (single and repeated trailing slashes).
  • Updated relay analysis tests to cover mixed normalized/non-normalized URI inputs.

func normalizeRelayURI(uri string) string {
    return strings.TrimRight(uri, "/")
}

// comparison path
allowedMap[normalizeRelayURI(relay.Uri)] = relay
normalizedUsed := normalizeRelayURI(used)

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