fix: add includeVFS parameter to getRelations() - VFS now visible

CRITICAL BUG FIX - VFS Files Were Completely Invisible

Workshop Team Issue:
- Import created 569 VFS files
- vfs.readdir('/') returned 0 items
- VFS was 100% unusable

Root Cause:
v4.4.0 added includeVFS to brain.find() but FORGOT brain.getRelations().
PathResolver.getChildren() calls getRelations() to find VFS relationships,
but those were being excluded by default - making ALL VFS files invisible!

Fix:
1. Add includeVFS parameter to GetRelationsParams interface
2. Wire includeVFS filtering in brain.getRelations()
   - Excludes VFS relationships by default (metadata.isVFS != true)
   - Include them when includeVFS: true
3. Update VFS to mark all relationships with metadata: { isVFS: true }
   - 7 relate() calls updated in VirtualFileSystem.ts
4. Update PathResolver to use includeVFS: true
   - resolveChild() line 200
   - getChildren() line 229

Impact:
- VFS is now fully functional again
- Consistent with v4.4.0 architecture (VFS separate from knowledge graph)
- All APIs now have includeVFS where needed

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/brainy.ts

@@ -1016,6 +1016,14 @@ export class Brainy<T = any> implements BrainyInterface<T> {
       filter.service = params.service
     }
 
+    // v4.5.1: Exclude VFS relationships by default (same pattern as brain.find())
+    // VFS relationships have metadata.isVFS = true
+    // Only include VFS relationships if explicitly requested
+    if (params.includeVFS !== true) {
+      filter.metadata = filter.metadata || {}
+      filter.metadata.isVFS = { notEquals: true }
+    }
+
     // Fetch from storage with pagination at storage layer (efficient!)
     const result = await this.storage.getVerbs({
       pagination: {