feat: continue Priority 1 any type fixes

- Fix remaining any types in electron test app (9 types)
- Fix remaining any types in shared config loader (11 types)
- Fix remaining any types in core plugin files (4 types)
- Fix remaining any types in polling contracts (8 types)
- Enhanced type safety across all test apps and core modules

Linting status: ✅ 0 errors, 292 warnings (down from 436 warnings)
Priority 1 progress: 144 warnings fixed (33% reduction)
Any types remaining: 76 (down from 113, 37% reduction)

src/definitions.ts

@@ -687,7 +687,7 @@ export interface CoordinationReport {
   timestamp: number;
   activeDid?: string;
   authUsed: boolean;
-  platformSpecific?: Record<string, any>;
+  platformSpecific?: Record<string, unknown>;
 }
 
 /**