C006 compliance check should recognize probar serve --cross-origin-isolated

[noahgift]

Problem

The probador comply command fails C006 (COOP/COEP headers) even when using probar serve --cross-origin-isolated:

$ probador comply --detailed .
  [✗] C006: COOP/COEP headers
      └─ No server config found for COOP/COEP headers

However, the project uses:

serve-dev:
    @probar serve www --port 8081 --cross-origin-isolated

Expected Behavior

C006 should recognize:

1. Makefile targets using probar serve --cross-origin-isolated
2. probar.toml configuration if present
3. Other common server configs (nginx.conf, apache.conf, etc.)

Current Behavior

C006 only looks for static config files and doesn't recognize dynamic server commands.

Suggested Fix

Parse Makefile for probar serve.*--cross-origin-isolated pattern:

fn check_coop_coep(path: &Path) -> ComplianceResult {
    // Check Makefile
    if let Ok(makefile) = std::fs::read_to_string(path.join("Makefile")) {
        if makefile.contains("--cross-origin-isolated") {
            return ComplianceResult::pass("COOP/COEP enabled via probar serve");
        }
    }
    // ... existing checks
}

Environment

• probador 0.4.1
• Linux

[noahgift]

Triage: P3 — WASM testing feature. Part of the multi-threaded WASM UX testing epic (#14). Not blocking core functionality.