feat(diff-processor): Improve diff sampling and file prioritization: increase inclusion thresholds, expand sampled context, and boost priority for interface/type and entry-point files

ts/context/diff-processor.ts

@@ -239,8 +239,20 @@ export class DiffProcessor {
       return 10;
     }
 
-    // Everything else - default priority
-    return 50;
+    // Start with default priority
+    let score = 50;
+
+    // Boost interface/type files - they're usually small but critical
+    if (filepath.includes('interfaces/') || filepath.includes('.types.')) {
+      score += 20;
+    }
+
+    // Boost entry points
+    if (filepath.endsWith('index.ts') || filepath.endsWith('mod.ts')) {
+      score += 15;
+    }
+
+    return score;
   }
 
   /**