feat: add ImageHandler with EXIF extraction and comprehensive MIME detection (v5.2.0)

Implements Phase 1.5 (Comprehensive MIME Type Detection) and adds built-in image processing support to IntelligentImportAugmentation.

**New Features:**
- ImageHandler: Extracts image metadata (dimensions, format, color space) using sharp
- EXIF extraction: Camera data, GPS, timestamps using exifr library
- Support for JPEG, PNG, WebP, GIF, TIFF, BMP, SVG, HEIC, AVIF formats
- MimeTypeDetector: Unified MIME type detection with magic byte support
- FormatDetector: Enhanced with image format detection via MIME + magic bytes

**Architecture Fixes:**
- Fixed brain.import() augmentation pipeline integration (src/brainy.ts:3140-3154)
- Added parameter spreading for ImportSource objects to enable augmentation access
- Fixed metadata propagation through ImportCoordinator to final results
- Added augmentation data check in ImportCoordinator.extract()

**Integration:**
- ImageHandler registered as built-in handler alongside CSV, Excel, PDF
- Images import as 'media' entities with 'image' subtype
- Full metadata preserved in knowledge graph entities
- Configuration options: enableImage, extractEXIF, imageDefaults

**Test Coverage:**
- 15 integration tests (image-import.test.ts) - 100% passing
- 27 unit tests (image-handler.test.ts) - 100% passing
- Format detection tests for all supported image types
- Error handling and resilience tests

**Breaking Changes:** None - backward compatible

Generated with Claude Code

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

src/api/UniversalImportAPI.ts

@@ -1,12 +1,12 @@
 /**
  * Universal Neural Import API
- * 
+ *
  * ALWAYS uses neural matching to map ANY data to our strict NounTypes and VerbTypes
  * Never falls back to rules - neural matching is MANDATORY
- * 
+ *
  * Handles:
  * - Strings (text, JSON, CSV, YAML, Markdown)
- * - Files (local paths, any format)
+ * - Files (local paths, any format) - uses MimeTypeDetector for 2000+ types
  * - URLs (web pages, APIs, documents)
  * - Objects (structured data)
  * - Binary data (images, PDFs via extraction)
@@ -18,6 +18,7 @@ import type { Brainy } from '../brainy.js'
 import type { Entity, Relation } from '../types/brainy.types.js'
 import { BrainyTypes, getBrainyTypes } from '../augmentations/typeMatching/brainyTypes.js'
 import { NeuralImportAugmentation } from '../augmentations/neuralImport.js'
+import { mimeDetector } from '../vfs/MimeTypeDetector.js'
 
 export interface ImportSource {
   type: 'string' | 'file' | 'url' | 'object' | 'binary'
@@ -157,21 +158,27 @@ export class UniversalImportAPI {
   /**
    * Import from file - reads and processes
    * Note: In browser environment, use File API instead
+   *
+   * Uses MimeTypeDetector for comprehensive format detection (2000+ types)
    */
   async importFromFile(filePath: string): Promise<NeuralImportResult> {
     // Read the actual file content
     const { readFileSync } = await import('node:fs')
+
+    // Use MimeTypeDetector for comprehensive format detection
+    const mimeType = mimeDetector.detectMimeType(filePath)
     const ext = filePath.split('.').pop()?.toLowerCase() || 'txt'
-    
+
     try {
       const fileContent = readFileSync(filePath, 'utf-8')
-      
+
       return this.import({
         type: 'file',
         data: fileContent,  // Actual file content
-        format: ext,
-        metadata: { 
+        format: ext,  // Keep ext for backward compatibility
+        metadata: {
           path: filePath,
+          mimeType,  // Add detected MIME type
           importedAt: Date.now(),
           fileSize: fileContent.length
         }