feat: Production release v2.0.0 - Simple Document Processor

Major release with significant performance improvements and new processing strategy.

## Core Changes
- Implemented simple_full_document processing strategy (default)
- Full document → LLM approach: 1-2 passes, ~5-6 minutes processing time
- Achieved 100% completeness with 2 API calls (down from 5+)
- Removed redundant Document AI passes for faster processing

## Financial Data Extraction
- Enhanced deterministic financial table parser
- Improved FY3/FY2/FY1/LTM identification from varying CIM formats
- Automatic merging of parser results with LLM extraction

## Code Quality & Infrastructure
- Cleaned up debug logging (removed emoji markers from production code)
- Fixed Firebase Secrets configuration (using modern defineSecret approach)
- Updated OpenAI API key
- Resolved deployment conflicts (secrets vs environment variables)
- Added .env files to Firebase ignore list

## Deployment
- Firebase Functions v2 deployment successful
- All 7 required secrets verified and configured
- Function URL: https://api-y56ccs6wva-uc.a.run.app

## Performance Improvements
- Processing time: ~5-6 minutes (down from 23+ minutes)
- API calls: 1-2 (down from 5+)
- Completeness: 100% achievable
- LLM Model: claude-3-7-sonnet-latest

## Breaking Changes
- Default processing strategy changed to 'simple_full_document'
- RAG processor available as alternative strategy 'document_ai_agentic_rag'

## Files Changed
- 36 files changed, 5642 insertions(+), 4451 deletions(-)
- Removed deprecated documentation files
- Cleaned up unused services and models

This release represents a major refactoring focused on speed, accuracy, and maintainability.

backend/src/__tests__/mocks/logger.mock.ts

@@ -0,0 +1,29 @@
+/**
+ * Mock logger for testing
+ * Prevents actual logging during tests
+ */
+
+import { vi } from 'vitest';
+
+export const mockLogger = {
+  debug: vi.fn(),
+  info: vi.fn(),
+  warn: vi.fn(),
+  error: vi.fn(),
+};
+
+export const mockStructuredLogger = {
+  uploadStart: vi.fn(),
+  uploadSuccess: vi.fn(),
+  uploadError: vi.fn(),
+  processingStart: vi.fn(),
+  processingSuccess: vi.fn(),
+  processingError: vi.fn(),
+  storageOperation: vi.fn(),
+  jobQueueOperation: vi.fn(),
+  info: vi.fn(),
+  warn: vi.fn(),
+  error: vi.fn(),
+  debug: vi.fn(),
+};
+