chore: don't log backtraces (#318)

The backtraces are huge and not readable with the default formatter, so
there's no point in logging them.

Author: m4tx

cot/src/error_page.rs

@@ -274,7 +274,6 @@ pub(super) fn handle_response_panic(
     log_panic(
         panic_payload,
         panic_location.as_deref(),
-        backtrace.as_ref(),
         request_data.as_ref(),
     );
     build_response(
@@ -401,8 +400,7 @@ fn log_error(error: &Error, request_data: Option<&RequestData>) {
     let span = tracing::span!(Level::ERROR,
         "request_error",
         error_type = %error.inner,
-        error_message = %error,
-        backtrace = ?error.backtrace()
+        error_message = %error
     );
     let _enter = span.enter();
     if let Some(req) = request_data {
@@ -415,15 +413,13 @@ fn log_error(error: &Error, request_data: Option<&RequestData>) {
 fn log_panic(
     panic_payload: &Box<dyn Any + Send>,
     panic_location: Option<&str>,
-    backtrace: Option<&Backtrace>,
     request_data: Option<&RequestData>,
 ) {
     let span = tracing::span!(
         Level::ERROR,
         "request_panic",
         panic_message = ?ErrorPageTemplateBuilder::get_panic_string(panic_payload),
-        location = ?panic_location,
-        backtrace = ?backtrace
+        location = ?panic_location
     );
     let _enter = span.enter();
     if let Some(req) = request_data {
@@ -485,15 +481,9 @@ mod tests {
     fn test_log_panic() {
         let panic_payload: Box<dyn Any + Send> = Box::new("Test panic");
         let panic_location = Some("src/test.rs:10");
-        let backtrace = Some(__cot_create_backtrace());
         let request_data = Some(create_test_request_data());
 
-        log_panic(
-            &panic_payload,
-            panic_location,
-            backtrace.as_ref(),
-            request_data.as_ref(),
-        );
+        log_panic(&panic_payload, panic_location, request_data.as_ref());
 
         assert!(logs_contain("Request handler panicked"));
         assert!(logs_contain("Test panic"));