fix(cli): unify PF diagnostics without sudo

[munezaclovis]

Depends on #317.

Closes #306.

Summary

• bind the Gateway health identity to its assigned backend ports
• classify low-port routing once as active, inactive, drifted, or unknown
• use direct unprivileged pfctl evidence with bounded HTTP and HTTPS identity-probe fallback
• expose matching plain and JSON diagnostics from status, doctor, and ports:status
• make ports:status exit successfully only for verified active routing

Tests

• cargo test -p daemon --test gateway_config
• cargo test -p daemon --test supervisor_foundation gateway_identity_readiness
• cargo test -p cli --test doctor
• cargo test -p cli --test status
• cargo test -p cli --test ports
• cargo clippy -p cli --all-targets -- -D warnings
• cargo clippy -p daemon --all-targets -- -D warnings

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[codspeed-hq]

Merging this PR will not alter performance

✅ 7 untouched benchmarks

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_{Comparing agent/unify-pf-diagnostics (898e44c) with agent/fix-pf-gateway-readiness (7ece4ca)}