fix(rust): Flush stdout after print to fix stream mode display

Author: cfsmp3

src/rust/lib_ccxr/src/util/log.rs

@@ -281,8 +281,16 @@ impl<'a> CCExtractorLogger {
 
     fn print(&self, args: &Arguments<'a>) {
         match &self.target {
-            OutputTarget::Stdout => print!("{args}"),
-            OutputTarget::Stderr => eprint!("{args}"),
+            OutputTarget::Stdout => {
+                print!("{args}");
+                // Flush stdout to ensure output appears immediately, especially when
+                // mixing with C code that also writes to stdout
+                let _ = std::io::Write::flush(&mut std::io::stdout());
+            }
+            OutputTarget::Stderr => {
+                eprint!("{args}");
+                let _ = std::io::Write::flush(&mut std::io::stderr());
+            }
             OutputTarget::Quiet => {}
         }
     }