refactor: modularize codebase and add 404 unit tests

Split large files into focused modules across all crates while
maintaining API compatibility via re-exports. Add comprehensive
unit tests covering core models, pipeline parsers, LLM triage,
DAST security tools, graph algorithms, and MCP parameter validation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

compliance-dast/src/tools/mod.rs

@@ -67,14 +67,8 @@ impl ToolRegistry {
         );
 
         // New infrastructure / analysis tools
-        register(
-            &mut tools,
-            Box::new(dns_checker::DnsCheckerTool::new()),
-        );
-        register(
-            &mut tools,
-            Box::new(dmarc_checker::DmarcCheckerTool::new()),
-        );
+        register(&mut tools, Box::new(dns_checker::DnsCheckerTool::new()));
+        register(&mut tools, Box::new(dmarc_checker::DmarcCheckerTool::new()));
         register(
             &mut tools,
             Box::new(tls_analyzer::TlsAnalyzerTool::new(http.clone())),
@@ -109,10 +103,7 @@ impl ToolRegistry {
             &mut tools,
             Box::new(openapi_parser::OpenApiParserTool::new(http.clone())),
         );
-        register(
-            &mut tools,
-            Box::new(recon::ReconTool::new(http)),
-        );
+        register(&mut tools, Box::new(recon::ReconTool::new(http)));
 
         Self { tools }
     }