cleanup: auto-fix clippy warnings in poc-memory

Applied cargo clippy --fix for collapsible_if, manual_char_comparison,
and other auto-fixable warnings.

poc-memory/src/agents/consolidate.rs

@@ -76,7 +76,7 @@ pub fn consolidate_full_with_progress(
 
         match knowledge::run_and_apply(store, agent_type, *count, "consolidate") {
             Ok(()) => {
-                let msg = format!("  Done");
+                let msg = "  Done".to_string();
                 log_line(&mut log_buf, &msg);
                 on_progress(&msg);
                 println!("{}", msg);