chore(release): 6.2.9 - fix critical VFS bugs (directory corruption)

Bug fixes:
- Fix verbCountsByType optimization skipping Contains relationships
- Fix UnifiedCache not invalidated on path deletion
- Add fast path for sourceId + verbType queries (common VFS pattern)
- Save statistics on first entity of each type

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

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

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@soulcraft/brainy",
-  "version": "6.2.8",
+  "version": "6.2.9",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@soulcraft/brainy",
-      "version": "6.2.8",
+      "version": "6.2.9",
       "license": "MIT",
       "dependencies": {
         "@aws-sdk/client-s3": "^3.540.0",