chore: recovery checkpoint - v3.0 API successfully recovered

CRITICAL CHECKPOINT - DO NOT PUSH TO GITHUB

Recovery Status:
- Successfully recovered brainy.ts from compiled JavaScript
- All core v3.0 API methods functional (add, get, update, delete, relate, find, etc.)
- Neural subsystem intact (562KB embedded patterns, NLP working)
- Augmentation pipeline operational (20+ augmentations)
- HNSW clustering system complete
- Triple Intelligence compiled (needs constructor fix)
- Test suite validates functionality

Changes preserved:
- 898 files with changes from last 3 days
- 144,475 insertions
- All augmentation improvements
- All test coverage enhancements
- Complete v3.0 feature set

This is a LOCAL checkpoint only - contains recovered work after corruption incident.
Created backup in .backups/brainy-full-20250910-151314.tar.gz

Branch: recovery-checkpoint-20250910-151433
Date: Wed Sep 10 03:18:04 PM PDT 2025

examples/tests/test-update-noun.js

@@ -0,0 +1,32 @@
+#!/usr/bin/env node
+
+import { BrainyData } from './dist/index.js'
+
+const brain = new BrainyData({ 
+  storage: { type: 'memory' },
+  verbose: false 
+})
+
+await brain.init()
+
+console.log('Test updateNoun metadata merging:')
+
+// Add with object as data (auto-detects as metadata)
+const id = await brain.addNoun({ name: 'TypeScript', version: '4.0' })
+console.log('1. Added:', id)
+
+// Get to verify initial state
+const initial = await brain.getNoun(id)
+console.log('2. Initial metadata:', initial?.metadata)
+
+// Update with new metadata (should merge)
+await brain.updateNoun(id, { version: '5.0', popularity: 'high' })
+
+// Get to verify merge
+const updated = await brain.getNoun(id)
+console.log('3. Updated metadata:', updated?.metadata)
+console.log('   - version:', updated?.metadata?.version, '(expected: 5.0)')
+console.log('   - popularity:', updated?.metadata?.popularity, '(expected: high)')
+console.log('   - name:', updated?.metadata?.name, '(expected: TypeScript)')
+
+process.exit(0)