debug(smart v0.1.16): log JSON brut complet en cas d'échec parse

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

agent/Cargo.lock

@@ -248,7 +248,7 @@ dependencies = [
 
 [[package]]
 name = "nanometrics-agent"
-version = "0.1.15"
+version = "0.1.16"
 dependencies = [
  "libc",
  "rumqttc",

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "nanometrics-agent"
-version = "0.1.15"
+version = "0.1.16"
 edition = "2021"
 
 [lib]

agent/src/metrics/smart.rs

@@ -138,7 +138,9 @@ pub fn collect() -> Option<Vec<crate::payload::SmartMetrics>> {
             }
             Err(e) => {
                 eprintln!("[smart] {} parse JSON échoué: {}", dev, e);
-                eprintln!("[smart] premiers 200 octets stdout: {:?}", &json.chars().take(200).collect::<String>());
+                eprintln!("[smart] --- JSON BRUT BEGIN ({} octets) ---", json.len());
+                eprintln!("{}", &*json);
+                eprintln!("[smart] --- JSON BRUT END ---");
             }
         }
     }