⚡ perf(doctor): optimize port matrix conflict check loop

[Cylae]

💡 What:

Optimized the port matrix conflict checking loop in server_manager::core::doctor::check_port_conflicts.

• Pre-allocated HashSet capacity based on the total count of service port definitions (HashSet::with_capacity(total_ports)).
• Eliminated per-iteration heap allocations by replacing port.host_ip.clone() (Option<String>) with port.host_ip.as_deref() (Option<&str>).
• Added a Criterion benchmark function doctor_check_port_conflicts in benches/service_benchmark.rs.

🎯 Why:

In the original code, checking for port conflicts in the service catalog iterated through all services and ports while cloning port.host_ip (Option<String>) on every inner iteration to construct the lookup key (Option<String>, u16, Protocol). This caused repeated heap allocations and dynamic HashSet re-hashes as capacity expanded from default initial sizes.

📊 Measured Improvement:

Benchmarked using Criterion (cargo bench --bench service_benchmark -- doctor_check_port_conflicts):

• Baseline runtime: 16.456 µs
• Optimized runtime: 11.155 µs
• Change: -32.27% (32.27% speedup, statistical significance p < 0.05)

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PR created automatically by Jules for task 13098466155646316055 started by @Cylae

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