Implement self-healing system Phase 1: Error capture and logging

- Add SelfHealingSystem with error observation infrastructure
- Capture errors with full context: type, message, stack trace, intent, inputs
- Log to MEMORY.md with deduplication (max 3 attempts per error signature)
- Integrate error capture in agent, tools, runtime, and scheduler
- Non-invasive: preserves all existing error handling behavior
- Foundation for future diagnosis and auto-fixing capabilities

Phase 1 of 4-phase rollout - observation only, no auto-fixing yet.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

adapters/runtime.py

@@ -181,6 +181,17 @@ class AdapterRuntime:
         except Exception as e:
             print(f"[Runtime] Error processing message: {e}")
             traceback.print_exc()
+            if hasattr(self.agent, 'healing_system'):
+                self.agent.healing_system.capture_error(
+                    error=e,
+                    component="adapters/runtime.py:_process_message",
+                    intent=f"Processing message from {message.platform}",
+                    context={
+                        "platform": message.platform,
+                        "user": message.username,
+                        "message_preview": message.text[:100],
+                    },
+                )
             await self._send_error_reply(message)
 
     async def _send_error_reply(self, message: InboundMessage) -> None: