feat: add tracing throughout, HTTP TraceLayer, detailed error logs

crates/application/src/tabs/parse_tab.rs

@@ -9,12 +9,14 @@ use super::deps::ParseTabDeps;
 
 pub async fn execute(deps: &ParseTabDeps, cmd: ParseTabCommand) -> Result<Song, DomainError> {
     let html = if let Some(raw_html) = cmd.html {
+        tracing::debug!("parsing from raw HTML input");
         Ok(raw_html)
     } else if let Some(source) = cmd.source {
         let tab_source = if source.starts_with("file://") {
             let path = source.trim_start_matches("file://");
             TabSource::File(PathBuf::from(path))
         } else {
+            tracing::debug!(url = source, "fetching tab from URL");
             TabSource::Url(source)
         };
         deps.fetcher
@@ -27,7 +29,17 @@ pub async fn execute(deps: &ParseTabDeps, cmd: ParseTabCommand) -> Result<Song,
         ))
     }?;
 
-    deps.parser
+    let song = deps
+        .parser
         .parse(&html)
-        .map_err(|e| DomainError::InfrastructureError(e.to_string()))
+        .map_err(|e| DomainError::InfrastructureError(e.to_string()))?;
+
+    tracing::debug!(
+        title = song.meta.title,
+        artist = song.meta.artist,
+        sections = song.sections.len(),
+        "tab parsed"
+    );
+
+    Ok(song)
 }