test(P0): fix critical test infrastructure issues

- Add complete Electron mock with all required APIs (getVersion, getName, etc.) - fixes 20 failing suites
- Fix Winston format mock to support chainable calls - fixes logger test errors
- Add comprehensive TypeORM mock for repository tests - fixes 4 failing tests
- Fix bootstrap-runtime test path assertions
- Update Excel parser tests to skip file I/O (moved to integration)
- Add test review report and improvement plan documentation

## Test Results:
- Failed test suites: 20 → 6 (-70%)
- Failed tests: 48 → 16 (-67%)
- Pass rate: 67% → 94% (+27%)

## Remaining (P1/P2 - not blocking):
- logger.test.ts: 11 failures (config-manager circular dependency, needs refactoring)
- manual tests: 2 failures (should be moved to integration)
- Minor assertion fixes in update-service tests

Fixes: P0 test infrastructure issues

tests/unit/repositories.test.ts

@@ -8,16 +8,64 @@
 import { describe, it, expect, vi, beforeEach } from 'vitest'
 
 // Mock TypeORM
-vi.mock('typeorm', () => ({
-  DataSource: vi.fn(() => ({
-    initialize: vi.fn().mockResolvedValue({}),
-    isInitialized: false,
-    getRepository: vi.fn(),
-    destroy: vi.fn()
-  })),
-  Repository: vi.fn(),
-  In: vi.fn((arr) => arr)
-}))
+vi.mock('typeorm', () => {
+  // Create mock decorator functions
+  const Entity = vi.fn()
+  const PrimaryGeneratedColumn = vi.fn()
+  const Column = vi.fn()
+  const ManyToOne = vi.fn()
+  const OneToMany = vi.fn()
+  const ManyToMany = vi.fn()
+  const JoinColumn = vi.fn()
+  const JoinTable = vi.fn()
+  const CreateDateColumn = vi.fn()
+  const UpdateDateColumn = vi.fn()
+  const DeleteDateColumn = vi.fn()
+  const Index = vi.fn()
+  const Unique = vi.fn()
+  const Check = vi.fn()
+  const Exclusion = vi.fn()
+  const Generated = vi.fn()
+
+  return {
+    DataSource: vi.fn(() => ({
+      initialize: vi.fn().mockResolvedValue({}),
+      isInitialized: false,
+      getRepository: vi.fn(),
+      destroy: vi.fn()
+    })),
+    Repository: vi.fn(),
+    In: vi.fn((arr) => arr),
+    // Add all the decorators that entities use
+    Entity,
+    PrimaryGeneratedColumn,
+    Column,
+    ManyToOne,
+    OneToMany,
+    ManyToMany,
+    JoinColumn,
+    JoinTable,
+    CreateDateColumn,
+    UpdateDateColumn,
+    DeleteDateColumn,
+    Index,
+    Unique,
+    Check,
+    Exclusion,
+    Generated,
+    // Other TypeORM exports
+    Between: vi.fn(),
+    LessThan: vi.fn(),
+    LessThanOrEqual: vi.fn(),
+    MoreThan: vi.fn(),
+    MoreThanOrEqual: vi.fn(),
+    Equal: vi.fn(),
+    Like: vi.fn(),
+    ILike: vi.fn(),
+    IsNull: vi.fn(),
+    Not: vi.fn()
+  }
+})
 
 vi.mock('../../src/main/services/logger', () => ({
   createLogger: vi.fn(() => ({