7B: Add parse error tracking (BMad review fix)

contracts.js

@@ -135,6 +135,7 @@ function extractContracts(filePath, relFile) {
 function extractAllContracts(subsystemMap, srcRoot) {
   const allContracts = [];
   const bySubsystem = {};
+  const parseErrors = [];
 
   for (const sub of subsystemMap.subsystems) {
     bySubsystem[sub.name] = [];
@@ -150,12 +151,12 @@ function extractAllContracts(subsystemMap, srcRoot) {
         allContracts.push(...contracts);
         bySubsystem[sub.name].push(...contracts);
       } catch (err) {
-        // Skip files that fail to parse
+        parseErrors.push({ file: relFile, error: err.message });
       }
     }
   }
 
-  return { contracts: allContracts, bySubsystem };
+  return { contracts: allContracts, bySubsystem, parseErrors };
 }
 
 /**