feat(logging-p0): add full-step logging to ERP automation and unify capturePageContext

Add ~45 structured log calls across extractor-core, cleaner, and erp-auth
to cover all automation steps (navigation, query, download, material processing).
Enhance capturePageContext with a step parameter for precise failure localization,
and fix missing capturePageContext calls in error handlers.

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

src/main/services/erp/erp-error-context.ts

@@ -11,6 +11,7 @@ export interface ErpErrorContext {
   pageUrl?: string
   frameHierarchy?: Array<{ name: string; url: string }>
   targetSelector?: string
+  step?: string
 }
 
 /**
@@ -22,7 +23,8 @@ export interface ErpErrorContext {
  */
 export async function capturePageContext(
   page: Page,
-  targetSelector?: string
+  targetSelector?: string,
+  step?: string
 ): Promise<ErpErrorContext> {
   const ctx: ErpErrorContext = {}
 
@@ -43,5 +45,9 @@ export async function capturePageContext(
     ctx.targetSelector = targetSelector
   }
 
+  if (step) {
+    ctx.step = step
+  }
+
   return ctx
 }