Add memory system, dynamic tool loading, and fix logging issues

- Add MemoryStore for persistent long-term and daily notes
- Add dynamic tool summary generation in system prompt
- Fix YAML frontmatter parsing for nanobot skill format
- Add GetSummaries() method to ToolRegistry
- Fix DebugCF logging to use structured metadata
- Improve web_search and shell tool descriptions

pkg/tools/web.go

@@ -36,7 +36,7 @@ func (t *WebSearchTool) Name() string {
 }
 
 func (t *WebSearchTool) Description() string {
-	return "Search the web. Returns titles, URLs, and snippets."
+	return "Search the web for current information. Returns titles, URLs, and snippets from search results."
 }
 
 func (t *WebSearchTool) Parameters() map[string]interface{} {