fix: CRITICAL systemic VFS metadata bug across ALL storage adapters (v4.7.4)

CRITICAL BUG FIX - Workshop Team Unblocked!

This hotfix resolves a systemic bug affecting ALL 7 storage adapters that
caused VFS queries to return empty results even when data existed.

Bug Pattern: `if (!metadata) continue` in getNouns()/getVerbs()
Impact: VFS queries returned empty arrays despite 577 relationships existing
Root Cause: Storage adapters skipped entities if metadata file read returned null

Fixes:
- storage: Fix metadata skip bug in 12 locations across 7 adapters
  (TypeAware, Memory, FileSystem, GCS, S3, R2, OPFS, Azure)
- neural: Fix SmartExtractor weighted score threshold (28 failures → 4)
- neural: Fix PatternSignal priority ordering
- api: Fix Brainy.relate() weight parameter not returned

Test Results:
- TypeAwareStorageAdapter: 17/17 passing (was 7 failures)
- SmartExtractor: 42/46 passing (was 28 failures)
- Neural clustering: 3/3 passing
- Brainy.relate(): 20/20 passing

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

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

src/storage/adapters/memoryStorage.ts

@@ -204,8 +204,8 @@ export class MemoryStorage extends BaseStorage {
       if (!noun) continue
 
       // Get metadata from separate storage
+      // FIX v4.7.4: Don't skip nouns without metadata - metadata is optional in v4.0.0
       const metadata = await this.getNounMetadata(id)
-      if (!metadata) continue // Skip if no metadata
 
       // v4.0.0: Create HNSWNounWithMetadata with metadata field
       const nounWithMetadata: HNSWNounWithMetadata = {
@@ -213,7 +213,7 @@ export class MemoryStorage extends BaseStorage {
         vector: [...noun.vector],
         connections: new Map(),
         level: noun.level || 0,
-        metadata: metadata // Include metadata field
+        metadata: (metadata || {}) as NounMetadata // Include metadata field (empty if none)
       }
 
       // Copy connections
@@ -466,8 +466,9 @@ export class MemoryStorage extends BaseStorage {
       if (!hnswVerb) continue
 
       // Get metadata from separate storage
+      // FIX v4.7.4: Don't skip verbs without metadata - metadata is optional in v4.0.0
+      // Core fields (verb, sourceId, targetId) are in HNSWVerb itself
       const metadata = await this.getVerbMetadata(id)
-      if (!metadata) continue // Skip if no metadata
 
       // v4.0.0: Create HNSWVerbWithMetadata with metadata field
       const verbWithMetadata: HNSWVerbWithMetadata = {
@@ -480,8 +481,8 @@ export class MemoryStorage extends BaseStorage {
         sourceId: hnswVerb.sourceId,
         targetId: hnswVerb.targetId,
 
-        // Metadata field
-        metadata: metadata
+        // Metadata field (empty if none)
+        metadata: metadata || {}
       }
 
       // Copy connections