Add cross-project pattern registry for retrieval-augmented generalization

- Create patterns/ directory with README, manifest, and 10 initial patterns
  covering Ollama JSON fallback, API escaping, deprecation, PTY auth,
  queue-poll, LLM-as-parser, credential rotation, reverse proxy binding,
  human approval gates, and transient retry.
- Wire pattern loading into architecture/pipeline.js based on task tags.
- Update architecture/orchestrator.js to load patterns and surface them in
  the system prompt.
- Update MEMORY.md, ARCHITECTURE.md, and CONTEXT.md to document the registry
  and record the decision.

architecture/orchestrator.js

@@ -98,6 +98,9 @@ class AgentOrchestrator {
     // Load relevant memory
     await this.pipeline.loadRelevantMemory(userInput, 5);
     
+    // Load cross-project patterns based on task input
+    await this.pipeline.loadPatterns(userInput);
+    
     // Build final packet
     const packet = this.pipeline.buildPacket(userInput);
     
@@ -130,10 +133,20 @@ class AgentOrchestrator {
       '',
       '---',
       '',
-      '# Memory',
-      contextPacket.memory.substring(0, 1000) // Truncate for brevity
+      '# Preferences',
+      contextPacket.preferences.substring(0, 2000) // Truncate for brevity
     ];
 
+    if (contextPacket.memory && contextPacket.memory.trim()) {
+      parts.push(
+        '',
+        '---',
+        '',
+        '# Memory',
+        contextPacket.memory.substring(0, 1000) // Truncate for brevity
+      );
+    }
+
     return parts.join('\n');
   }