Enhance error handling in DbError conversion: Improved the From<PgError> implementation to provide detailed error messages, including SQLSTATE, detail, and hint when available, for better debugging and clarity in database error reporting.

src/db/connection.rs

@@ -32,7 +32,19 @@ impl std::error::Error for DbError {}
 
 impl From<PgError> for DbError {
     fn from(err: PgError) -> Self {
-        DbError::new(format!("Postgres-Fehler: {err}"))
+        if let Some(db_err) = err.as_db_error() {
+            let code = db_err.code();
+            let message = db_err.message();
+            let detail = db_err.detail().unwrap_or_default();
+            let hint = db_err.hint().unwrap_or_default();
+
+            DbError::new(format!(
+                "Postgres-Fehler: {} (SQLSTATE: {}, Detail: {}, Hint: {})",
+                message, code, detail, hint
+            ))
+        } else {
+            DbError::new(format!("Postgres-Fehler (Client): {err}"))
+        }
     }
 }